grand am 3.5 swap problems - Page 3

2kSCT · 04-05-2012, 03:34 PM

Well I just got back from the j/y with 3 new coils and an ICM and I guess we're gonna see how that works.

2kSCT · 04-05-2012, 06:50 PM

Well swapped in the J/Y ICM, test drove it, still did it. Swapped in the J/Y coils, test drove it, still did it. So I guess from here it's either the exhaust back pressure or crank sensor. I had a feeling that wasn't gonna help because my MSD coils are... Well MSD and the ICM worked fine before the swap. Ugh I don't know what to do...

gsanche7 · 04-05-2012, 07:52 PM

U still havent found a solution ? Damm .....u should have got some crank sensors .

locoman99 · 04-05-2012, 08:07 PM

Quote:

Originally Posted by 2kSCT

Well swapped in the J/Y ICM, test drove it, still did it. Swapped in the J/Y coils, test drove it, still did it. So I guess from here it's either the exhaust back pressure or crank sensor. I had a feeling that wasn't gonna help because my MSD coils are... Well MSD and the ICM worked fine before the swap. Ugh I don't know what to do...

No such thing as "too little backpressure"

2kSCT · 04-05-2012, 09:11 PM

Where did I say "too little back pressure"?

2kSCT · 04-05-2012, 09:24 PM

So I went outside to mess with the kit a little bit. I think I'm going to assume that the problem is that the sensor is too far from the pulley. I don't have a feeler gauge to measure the gap but I think I could probably fit a nickel in between there if not something thicker. Also the mount feels a tad bit loose. If I had to guess I would say it moves about .005" haha. I can't see it wiggle but I can feel it. So now I gotta go get some 1/2" allan wrenches because simple hex bolts would have been too easy for Milzy to use... Haha. So ideas on maybe getting the sensor closer? A hammer? Haha

locoman99 · 04-05-2012, 09:25 PM

Quote:

Originally Posted by 2kSCT

Hey, I'm having basically the same problem here after my 3500 swap. Is yours more like a misfire that only happens when your car downshifts for passing or trying to go faster? Did you do any modifications to the exhaust by any chance? When I did my swap, I also got Milzy's headers and high flow cat along with my Borla catback so one idea being thrown around is insufficient back pressure. Mike at Milzy suggested the ICM could be bad and everyone else is basically saying check over everything and make sure it was done right.

Here.

HOYS · 04-05-2012, 09:57 PM

You can blame Marc from TCE for the allen head bolts.

They might be metric...but I'm pretty sure Marc uses standard for most fasteners.

gsanche7 · 04-05-2012, 10:21 PM

I think we should try the 7x crank sensor ... question 2ksct does your car throw a battery code like on the intrument cluster?

2kSCT · 04-05-2012, 11:40 PM

Yeah it does every now and then. Sorry about the size but I uploaded I from my busted iPhone so I don't know how to change it

Starglow · 04-06-2012, 05:41 AM

That gap is too wide. Think in terms of .040 spark plug gap to get an idea of the correct spacing. You should invest in a feeler gauge set...they aren't very expensive.

If the sensor feels loose, then it's going to vibrate while the engine is running which may contribute to the problems you're having. Did you apply any locktite to the bracket bolts when you installed them? If the bracket feels loose, then those bolts are going to start backing out over time.

2kSCT · 04-06-2012, 06:31 AM

Well that won't move it closer. If anything tightening the bracket more will probably more it further. Is there a way to bend it just a tad bit?

gsanche7 · 04-06-2012, 03:21 PM

i moved it as close as possible mine had alot more space to give and that was the problem i suggest u drill out your bottom hole bigger so it can get closer mine runs like a champ now!!!!

AaronGTR · 04-06-2012, 05:10 PM

^I'm thinking this may be the solution. And I also agree with starglow... get a feeler gauge set. They are cheap and you can use them for other things like checking spark plugs gaps too. Try and get the sensor as close as possible and see what the gap is. If it's more than the maximum gap they recommend, try drilling out the bottom hole on the bracket over size slightly to give you more adjustability. And I would definitely use some locktite on the bolts. The bracket shouldn't have any movement in it. You don't want that sensor moving around while the engine is running.

2kSCT · 04-06-2012, 09:01 PM

Problem solved. Let this thread die the most painful death a thread has ever died.

Woooooohoooooo!

04-05-2012, 11:40 PM	#50
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Yeah it does every now and then. Sorry about the size but I uploaded I from my busted iPhone so I don't know how to change it Last edited by 2kSCT; 04-06-2012 at 12:08 AM.

04-06-2012, 05:10 PM	#54
AaronGTR BlingWithBallz AKA: Aaron Join Date: Aug 2002 Location: Detroit area, MI Age: 43 Posts: 12,254 Vehicle: 2000 Grand Am GT1 2dr	^I'm thinking this may be the solution. And I also agree with starglow... get a feeler gauge set. They are cheap and you can use them for other things like checking spark plugs gaps too. Try and get the sensor as close as possible and see what the gap is. If it's more than the maximum gap they recommend, try drilling out the bottom hole on the bracket over size slightly to give you more adjustability. And I would definitely use some locktite on the bolts. The bracket shouldn't have any movement in it. You don't want that sensor moving around while the engine is running. __________________ The few, the proud, the boosted! 13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011) See it here. the total package.

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04-05-2012, 03:34 PM	#41
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Well I just got back from the j/y with 3 new coils and an ICM and I guess we're gonna see how that works.

04-05-2012, 06:50 PM	#42
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Well swapped in the J/Y ICM, test drove it, still did it. Swapped in the J/Y coils, test drove it, still did it. So I guess from here it's either the exhaust back pressure or crank sensor. I had a feeling that wasn't gonna help because my MSD coils are... Well MSD and the ICM worked fine before the swap. Ugh I don't know what to do...

04-05-2012, 07:52 PM	#43
gsanche7 GAGT - Newbie AKA: Gabriel Join Date: Apr 2012 Location: Los Angeles California Posts: 23 Vehicle: 2001 Grand Am GT Coupe	U still havent found a solution ? Damm .....u should have got some crank sensors .

04-05-2012, 09:11 PM	#45
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Where did I say "too little back pressure"?

04-05-2012, 09:24 PM	#46
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	So I went outside to mess with the kit a little bit. I think I'm going to assume that the problem is that the sensor is too far from the pulley. I don't have a feeler gauge to measure the gap but I think I could probably fit a nickel in between there if not something thicker. Also the mount feels a tad bit loose. If I had to guess I would say it moves about .005" haha. I can't see it wiggle but I can feel it. So now I gotta go get some 1/2" allan wrenches because simple hex bolts would have been too easy for Milzy to use... Haha. So ideas on maybe getting the sensor closer? A hammer? Haha

04-05-2012, 09:57 PM	#48
HOYS lolGM AKA: Colin Join Date: Feb 2010 Location: Dayton, Ohio Posts: 1,102 Vehicle: 2001 Impreza 2.5 RS	You can blame Marc from TCE for the allen head bolts. They might be metric...but I'm pretty sure Marc uses standard for most fasteners.

04-05-2012, 10:21 PM	#49
gsanche7 GAGT - Newbie AKA: Gabriel Join Date: Apr 2012 Location: Los Angeles California Posts: 23 Vehicle: 2001 Grand Am GT Coupe	I think we should try the 7x crank sensor ... question 2ksct does your car throw a battery code like on the intrument cluster?

04-06-2012, 05:41 AM	#51
Starglow GAGT - Member AKA: Starglow Join Date: Aug 2011 Location: North Carolina Posts: 521 Vehicle: 1999 Grand AM - LX9	That gap is too wide. Think in terms of .040 spark plug gap to get an idea of the correct spacing. You should invest in a feeler gauge set...they aren't very expensive. If the sensor feels loose, then it's going to vibrate while the engine is running which may contribute to the problems you're having. Did you apply any locktite to the bracket bolts when you installed them? If the bracket feels loose, then those bolts are going to start backing out over time.

04-06-2012, 06:31 AM	#52
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Well that won't move it closer. If anything tightening the bracket more will probably more it further. Is there a way to bend it just a tad bit?

04-06-2012, 03:21 PM	#53
gsanche7 GAGT - Newbie AKA: Gabriel Join Date: Apr 2012 Location: Los Angeles California Posts: 23 Vehicle: 2001 Grand Am GT Coupe	i moved it as close as possible mine had alot more space to give and that was the problem i suggest u drill out your bottom hole bigger so it can get closer mine runs like a champ now!!!!

04-06-2012, 09:01 PM	#55
2kSCT GAGT - Member AKA: Andrew Join Date: May 2011 Location: Riverside, CA Posts: 31 Vehicle: 2000 GT/SCT Sedan	Problem solved. Let this thread die the most painful death a thread has ever died. Woooooohoooooo!