Misfire

[Blackrider]

Alright here is my problem Latly i have been Misfiring. But it is only When i am winding out Second and at about 4500. It Drive Perfect when i am Driving Normaly. The TPS is Bran New aswell as the Plugs (Correct gap) And I just replaced the Fuel Filter. Now I got the Code Red and it was a Multipal Misfire All Cylinders. So any thoughts on what this could be Keeping in Mind it only happends Flat Out in Second at around 4500 and on?

Edit: For Some Reason It also Started to Hang On TO Gears Longer. Say if it was to give it about 75% untill about 4 Grand Then once it hit for grand i would back iff to 25% So it would shift. It will hang at for for about 3 seconds

[Greed4Speed]

Check your plug wires.

[1/2dolla]

try without TPS and see if it goes back to normal. Those things are more a problem than they are useful IMO

[Blackrider]

Plug wires have 40,000KM on them. And This is the The TPS Not the TPS Tech

[BMOBYLE]

How does she idle black?

Your positve that all your wires(firing order) are correct?

Check them coil towers and see if there is any corrosion underneath the wires. Usually #5 and #2 get the worst of it.

also double check the wire harness and connector to that tps if it was just replaced.

[Greed4Speed]

40k miles on the wires but they could have been messed up(insulation nicked, sliced, or pulled apart) when you pulled them off to change the plugs. Or they may not totally clipped onto the plug or coil. Its just a simple thing to check before thinking its somthing more indepth. Just like if an electrical component messes up you check the fuse first.

[Blackrider]

Originally posted by BMOBYLE
How does she idle black?

Your positve that all your wires(firing order) are correct?

Check them coil towers and see if there is any corrosion underneath the wires. Usually #5 and #2 get the worst of it.

also double check the wire harness and connector to that tps if it was just replaced.

Idle is Great and i mean i can Punch it all the way through first its not untill 5000 in second that **** starts to go down hill. The Firing order is Correct, And If the wires were getting bad wouldent Run like crap all the time?

[BMOBYLE]

Originally posted by Blackrider
Idle is Great and i mean i can Punch it all the way through first its not untill 5000 in second that **** starts to go down hill. The Firing order is Correct, And If the wires were getting bad wouldent Run like crap all the time?

Yeah and no. Usually when you start to load the engine is when they go sour.

Dude I think your coils are takin a crap.
How is the other gears at 5k rpms?

Also might want to check that site that tells you what pcm update your due for. There was one for timing retarding too much upon accelerating but was more for bogging off the line.

[Blackrider]

What Site are you refurring to?

And It Seams To be geting worse. I'm going to Get new wires tomorrow and if that dosent work have the coils retested

[iceman]

I've had problems like this 3 times now. The first was a clogged injector, the second a bad injector.

The third started last week when I put on the taylor wires. They fit like butt and I'd switch back to stock but I broke one in the process.. doh.. MSD ones on the way.

The problem is.. at the same time.. it feels just like a bad injector, and I've been through a huuuuuuuuge monsoon that soaked my filter pretty good and stalled the car ( ) . Hopefully I didn't do any damage and a good set of wires (that fit) will fix me up.

Also none of my cylinders are reading misfires when it happens, which is the annoying part, so it makes troubleshooting a PITA.

Just wanted to toss you that little bit of info about the injector.. Best way to clean them is the pressurized fuel injector cleaner from a mechanic , BMOBYLE can elaborate more on how that works, because I forget.

[Blackrider]

Originally posted by iceman
I've had problems like this 3 times now. The first was a clogged injector, the second a bad injector.

The third started last week when I put on the taylor wires. They fit like butt and I'd switch back to stock but I broke one in the process.. doh.. MSD ones on the way.

The problem is.. at the same time.. it feels just like a bad injector, and I've been through a huuuuuuuuge monsoon that soaked my filter pretty good and stalled the car ( ) . Hopefully I didn't do any damage and a good set of wires (that fit) will fix me up.

Also none of my cylinders are reading misfires when it happens, which is the annoying part, so it makes troubleshooting a PITA.

Just wanted to toss you that little bit of info about the injector.. Best way to clean them is the pressurized fuel injector cleaner from a mechanic , BMOBYLE can elaborate more on how that works, because I forget.

Oww man Iceman that makes me feel 10 times better now that i know i'm not the only one. And i know what you mean tonight my car started to misfire well just driving normaly and NO Code! The only code I get is When i Pin it in second. And i get the good old flashing SES Light then it goes away. and when i get it scanned. Random Misfire all Cylinders Thanks alot iceman I'll keep that info in mind

[iceman]

Little misfires like that won't throw a code, that's a problem. I ahve to drive around with the autotap and watch for misfires... without hitting anything at the same time. PITA to trace, i'm tellin ya!! In my case, though, definitely starting with the wires since everything was peachy before that.

[Blackrider]

Hey Iceman Wanna Mail me the Autotap for a Fue Days I will Return is I Sware

[Mike Jung]

Originally posted by BMOBYLE
...Also might want to check that site that tells you what pcm update your due for. There was one for timing retarding too much upon accelerating but was more for bogging off the line.

Originally posted by Blackrider
What Site are you refurring to?...

Found it from thread: Vin powered repro pcm site

http://calid.gm.com/vci/

[Magnum]

I bet you have either a coil crapping out or a wire or two.... Whaddaya know, I've got an (almost) brand new set of coil packs here... Good way to check the coils is to swap them with a known good set, and see if the problem disappears. Soooo, wanna come to gimli? Or we could meet up on Sunday in Wpg or sumthin.

[Blackrider]

Aww man what are you doing tonight???? I get off at 715 60 min drive 830 at the latest my car is getting bad!

P.S. Are they your stockers?

[Magnum]

off at 5, 60 min drive home to coils, so i'll be there at 6. It's up to you - how soon do you want them? I have the 3 stockers from my '03, which you can use to test, (but I don't wanna sell 'em, just in case) and I have 3 stockers from the '01 (105,000km on 'em) - if you want them, they're yours for $10ea. I also have 3 other used coils I picked up from a wrecker a long time ago. If you want 'em, take 'em.

[Blackrider]

Originally posted by Magnum
off at 5, 60 min drive home to coils, so i'll be there at 6. It's up to you - how soon do you want them? I have the 3 stockers from my '03, which you can use to test, (but I don't wanna sell 'em, just in case) and I have 3 stockers from the '01 (105,000km on 'em) - if you want them, they're yours for $10ea. I also have 3 other used coils I picked up from a wrecker a long time ago. If you want 'em, take 'em.

I shall call you on my last Break I will be comming out tonight, although you might have to meat me half way, Hopfuly my car makes it

[Magnum]

couple other questions: are you still running Bosch plugs? Stock (original) wires? You're probably due for a wire change, too. they're kinda like the alternator-battery relationship: If you toast a wire and leave it, the coil will overheat (and die) quickly.

[Blackrider]

Originally posted by Magnum
couple other questions: are you still running Bosch plugs? Stock (original) wires? You're probably due for a wire change, too. they're kinda like the alternator-battery relationship: If you toast a wire and leave it, the coil will overheat (and die) quickly.

The Plugs are Bran New maby 2000KM on them. The wires have 40,000KM on them.