Car won't start

cmtapanes · 11-15-2006, 08:32 AM

All right, I look around before I ask the question and from searching around I decided to change the key cylinder thinking that could be the PASSLOCK but the car won't start. I have sparks and the engine turns. Is not getting fuel to the engine and the fuel pump is working as well.

My friends is telling me that is the computer because he plug the computer to his computer and he's not getting any reading. I have the Digital Horsepower PCM.

I drove the car to the gas station and when I try to start the car again the car won't start; like I say the engine turns, I have fuel, battery if fine and the fuel pump is fine but is not pumping gas to the engine and my friend is telling me that the PCM is the problem.

Any sugestions?

coupe · 11-15-2006, 08:35 AM

I cant imagine it being the PCM.

I wouldnt doubt the fuel filter is clogged.

cmtapanes · 11-15-2006, 09:37 AM

The filter is fine. My friend is telling me that there's no power going to the fuel pump and he check the relay for the pump and the relay is just fine. That's why is telling me is the PCM.

Edit: when he plugs his computer (scanner) to the car PCM is not communicating. And he tested the pump and the pump works. Is just not getting power to the pump

Lab Rat · 11-15-2006, 09:41 AM

Is your security light on? Or flashing?

coupe · 11-15-2006, 09:44 AM

Im confused, you say the pump is working, then you say the pump isnt getting power. How do you know its fine if its not getting power?
It is very possible your fuel pump is toasted or on its way out.

Have you changed the filter lately?

Sprucegagt · 11-15-2006, 10:13 AM

Quote:

Originally Posted by cmtapanes

The filter is fine. My friend is telling me that there's no power going to the fuel pump and he check the relay for the pump and the relay is just fine. That's why is telling me is the PCM.

Edit: when he plugs his computer (scanner) to the car PCM is not communicating. And he tested the pump and the pump works. Is just not getting power to the pump

How are you verifying that the relay is okay?

cmtapanes · 11-15-2006, 10:55 AM

he tested the fuel pump by connecting the pump to a direct power source and the pump works. The filter is fine 2. He's not able to make connection to the DHP PCM but I just spoke to him and he told me that he was able to connect to another computer on the car (maybe a memory), I'm not sure what computer and he's getting the code u1000.

The relay of the pump is ok.

pyro · 11-15-2006, 11:03 AM

Quote:

Originally Posted by cmtapanes

he tested the fuel pump by connecting the pump to a direct power source and the pump works. The filter is fine 2. He's not able to make connection to the DHP PCM but I just spoke to him and he told me that he was able to connect to another computer on the car (maybe a memory), I'm not sure what computer and he's getting the code u1000.

The relay of the pump is ok.

sounds exactly like someones car that i used to know. has it been doing this for awhile? it was always trying to turn over but it couldnt. it ended up being the fuel pump going bad. when was the last time you had it and the filter changed out? it might be reading good but it would be on its way out.

cmtapanes · 11-15-2006, 11:10 AM

No, this is the first time it happends. Looking around for a defition of code U1000 this is what I found:

This information applies to all GM vehicles Using Class 2 communication.

DTC U1000 or U1255 may set current or history, with or without other DTCs.

These DTCs set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send the message.

If the DTC U1000 or U1255 is set in history with other DTCs set current or history, diagnose the other DTCs first.
If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up.
When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list.
If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications. Look at the customer's concern (i.e., intermittent, erratic tachometer operation). This will probably be a better indication of the control module that is the source of the concern.

pyro · 11-15-2006, 11:29 AM

is your pcm plugged in all the way? and all the connections on the fuel pump and cylindar? maybe one of those came loose when you installed it.

Sprucegagt · 11-15-2006, 11:32 AM

What have you changed recently on the car? It sounds like the PCM can't find the BCM or another module in the car.

EDIT: Also check your fuses. You may have a short somewhere.

cmtapanes · 11-15-2006, 01:07 PM

The PCM was install more than 5 months ago. I already check the fuse box and all the fuses are ok. The car is been taken to another place to be plug and scann the PCM. My friend didn't have the computer the dealer uses.

Edit: I hope I don't have to re-flash the PCM I would lose all the DHP settings.

pyro · 11-15-2006, 01:10 PM

Quote:

Originally Posted by cmtapanes

The PCM was install more than 5 months ago. I already check the fuse box and all the fuses are ok. The car is been taken to another place to be plug and scann the PCM. My friend didn't have the computer the dealer uses.

Edit: I hope I don't have to re-flash the PCM I would lose all the DHP settings.

dhp offers one free reflash...im not sure what it covers though.

cmtapanes · 11-15-2006, 02:11 PM

yeah, I know but if I reflash and I keep having the same problem

cmtapanes · 11-16-2006, 08:23 AM

I just spoke to my friend and the computer seem to be fine but there's no power getting to the PCM and they are looking to see if there's a wire some where loose. Any one has a suggestion where to look?

pyro · 11-16-2006, 08:37 AM

did you check the under-hood fuse block? might be a maxifuse for it...

Sprucegagt · 11-16-2006, 08:37 AM

The PCM gets it's power from the underhood fuse block and drivers side fuse block. You can pop out the drivers side fuse block and check the wires to be sure none have come loose. Be gentle when pulling it out because the harness can catch on the dash support framework.

cmtapanes · 11-16-2006, 09:30 AM

they have check the fuse box already and all the fuses are fine.

coupe · 11-16-2006, 09:36 AM

Quote:

Originally Posted by cmtapanes

they have check the fuse box already and all the fuses are fine.

He means check the wires going to the fuse box, not the fuses themselves.

cmtapanes · 11-16-2006, 10:25 AM

They found the problem; a connector that's on the driver side kick panel came loose. Could be one that come from the fuse box to the PCM.

11-15-2006, 08:32 AM	#1
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	Car won't start All right, I look around before I ask the question and from searching around I decided to change the key cylinder thinking that could be the PASSLOCK but the car won't start. I have sparks and the engine turns. Is not getting fuel to the engine and the fuel pump is working as well. My friends is telling me that is the computer because he plug the computer to his computer and he's not getting any reading. I have the Digital Horsepower PCM. I drove the car to the gas station and when I try to start the car again the car won't start; like I say the engine turns, I have fuel, battery if fine and the fuel pump is fine but is not pumping gas to the engine and my friend is telling me that the PCM is the problem. Any sugestions?

11-15-2006, 08:35 AM	#2
coupe lick it AKA: Rand Join Date: May 2003 Location: Grand Rapids, Mi Age: 40 Posts: 7,347 Vehicle: 99 GAGT/96 Z71/05 R6	I cant imagine it being the PCM. I wouldnt doubt the fuel filter is clogged. __________________ CarDomain.com http://profile.myspace.com/index.cfm...endID=31690558 he has asserted his dominance over competing males with the loud masculine sound form his exaust system, Females searching for a potential mate will be driven away by weaker exaust systems and attracted to his SLP.

11-15-2006, 09:37 AM	#3
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	The filter is fine. My friend is telling me that there's no power going to the fuel pump and he check the relay for the pump and the relay is just fine. That's why is telling me is the PCM. Edit: when he plugs his computer (scanner) to the car PCM is not communicating. And he tested the pump and the pump works. Is just not getting power to the pump Last edited by cmtapanes; 11-15-2006 at 09:40 AM.

11-15-2006, 09:41 AM	#4
Lab Rat Fear the Four AKA: Craig Join Date: Jul 2005 Location: Kenosha, Wi. Posts: 452 Vehicle: 2000 Grand Am SE	Is your security light on? Or flashing? __________________ Lab Rat Fear the Four

11-15-2006, 09:44 AM	#5
coupe lick it AKA: Rand Join Date: May 2003 Location: Grand Rapids, Mi Age: 40 Posts: 7,347 Vehicle: 99 GAGT/96 Z71/05 R6	Im confused, you say the pump is working, then you say the pump isnt getting power. How do you know its fine if its not getting power? It is very possible your fuel pump is toasted or on its way out. Have you changed the filter lately? __________________ CarDomain.com http://profile.myspace.com/index.cfm...endID=31690558 he has asserted his dominance over competing males with the loud masculine sound form his exaust system, Females searching for a potential mate will be driven away by weaker exaust systems and attracted to his SLP.

11-15-2006, 10:55 AM	#7
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	he tested the fuel pump by connecting the pump to a direct power source and the pump works. The filter is fine 2. He's not able to make connection to the DHP PCM but I just spoke to him and he told me that he was able to connect to another computer on the car (maybe a memory), I'm not sure what computer and he's getting the code u1000. The relay of the pump is ok. Last edited by cmtapanes; 11-15-2006 at 11:00 AM.

11-15-2006, 11:10 AM	#9
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	No, this is the first time it happends. Looking around for a defition of code U1000 this is what I found: This information applies to all GM vehicles Using Class 2 communication. DTC U1000 or U1255 may set current or history, with or without other DTCs. These DTCs set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send the message. If the DTC U1000 or U1255 is set in history with other DTCs set current or history, diagnose the other DTCs first. If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up. When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list. If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications. Look at the customer's concern (i.e., intermittent, erratic tachometer operation). This will probably be a better indication of the control module that is the source of the concern.

11-15-2006, 11:29 AM	#10
pyro mAUDIrator AKA: Jeremy Join Date: May 2005 Location: Wesley Chapel, FL Age: 34 Posts: 3,837 Vehicle: '05 A4 1.8T	is your pcm plugged in all the way? and all the connections on the fuel pump and cylindar? maybe one of those came loose when you installed it. __________________ They can come closer than close, yeah...original they never will be. Florida Members...CLICK HERE

11-15-2006, 11:32 AM	#11
Sprucegagt Schwartz Power! AKA: Andy Join Date: Aug 2002 Location: Ranson, WV Age: 46 Posts: 2,027 Vehicle: 2000 Grand Am GT	What have you changed recently on the car? It sounds like the PCM can't find the BCM or another module in the car. EDIT: Also check your fuses. You may have a short somewhere. __________________ 2000 Grand Am GT (some day it will be SC/T) Mods: alot

11-15-2006, 01:07 PM	#12
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	The PCM was install more than 5 months ago. I already check the fuse box and all the fuses are ok. The car is been taken to another place to be plug and scann the PCM. My friend didn't have the computer the dealer uses. Edit: I hope I don't have to re-flash the PCM I would lose all the DHP settings.

11-15-2006, 02:11 PM	#14
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	yeah, I know but if I reflash and I keep having the same problem

11-16-2006, 08:23 AM	#15
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	I just spoke to my friend and the computer seem to be fine but there's no power getting to the PCM and they are looking to see if there's a wire some where loose. Any one has a suggestion where to look?

11-16-2006, 08:37 AM	#16
pyro mAUDIrator AKA: Jeremy Join Date: May 2005 Location: Wesley Chapel, FL Age: 34 Posts: 3,837 Vehicle: '05 A4 1.8T	did you check the under-hood fuse block? might be a maxifuse for it... __________________ They can come closer than close, yeah...original they never will be. Florida Members...CLICK HERE

11-16-2006, 09:30 AM	#18
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	they have check the fuse box already and all the fuses are fine.

11-16-2006, 10:25 AM	#20
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	They found the problem; a connector that's on the driver side kick panel came loose. Could be one that come from the fuse box to the PCM.

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