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Misfire Help

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Old 06-19-2008, 09:49 AM
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Originally Posted by rrutter81
listen to him....

its your injector and id put money on it. Contact zzp and get it replaced.

harness is fine,

unless your other cylinders are misfiring your gap is fine.

.37 is a good gap.
they said i can send it back and they'll flow match them. if nothins wrong i owe them about $50 if theres somehting wrong they'll take care of it. turn around time is 2 weeks though
Old 06-19-2008, 09:52 AM
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Originally Posted by Altiery54
they said i can send it back and they'll flow match them. if nothins wrong i owe them about $50 if theres somehting wrong they'll take care of it. turn around time is 2 weeks though
If they count flow-matching as "wrong" then you wont owe them anything.

Place a note that under idle it knocks and that when u put the injector in another cylinder the issue follows.

Dont be intimidated about it. Might even help to give them a print out of the knocks when u placed it in the 1st and 2nd cylinder.

dont put it in cyl4 though. lol that one already has enough issues.
Old 06-19-2008, 08:28 PM
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update: i switched around the coil packs and still no solution i played with the plug gap with no solution. i am taking the injectors and harness to have it flow balanced to make sure thats right cause at the moment that the only thing i can forsee being wrong. unlesss its something with the tune which i highly doubt cause its tuned by wicked.
Old 06-19-2008, 08:39 PM
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do you have your tune saved? any logs? shoot em my way if you do
Old 06-20-2008, 04:12 AM
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Originally Posted by Altiery54
update: i switched around the coil packs and still no solution i played with the plug gap with no solution. i am taking the injectors and harness to have it flow balanced to make sure thats right cause at the moment that the only thing i can forsee being wrong. unlesss its something with the tune which i highly doubt cause its tuned by wicked.
You switched the coil packs? Like you took #1 and put it in #2? That would be a VARY BAD idea, me thinks. Then the spark from CYl #2 is firing in #1... which is at a totally different set of timing.

Originally Posted by lsjwannabe
do you have your tune saved? any logs? shoot em my way if you do
He was tuned by WickedSS2005. PM him and he can shoot you the tune probably.
Old 06-20-2008, 07:19 AM
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Originally Posted by USMCFieldMP
You switched the coil packs? Like you took #1 and put it in #2? That would be a VARY BAD idea, me thinks. Then the spark from CYl #2 is firing in #1... which is at a totally different set of timing.



He was tuned by WickedSS2005. PM him and he can shoot you the tune probably.
i swiched the pack 1 and pack 4. i was also seeing the 3rd cylindar misfiring a litle last night. so fuc* my car. any1 want $100 to come total it. i am pulling the injectors and harness today and taking them to get flow balanced hopefully sometime this weekend. and i'm going 2 have them check the harness for possible shorts
Old 06-20-2008, 07:23 AM
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**** man, that sucks. Have lsjwannabe look at Wicked's tune first, before you start spending money.
Old 06-20-2008, 07:24 AM
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Originally Posted by USMCFieldMP
**** man, that sucks. Have lsjwannabe look at Wicked's tune first, before you start spending money.
wicked is on vaca bro. thats another week b4 he can get it out. i guess if i have 2 wait i have 2 wait. hell my meth will be here monday lol i guess i'll have something to do while its down
Old 06-20-2008, 07:27 AM
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Hmmmmm... odd. So the condition is getting worse. That's not good. Vacation is ghey. Work = Man.
Old 06-20-2008, 07:28 AM
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Originally Posted by USMCFieldMP
YOUR problem is more than likely related to Spark Plugs... or a blown IC Pump.

Actually, there are a lot of possibilities for your problem. How are your IAT2's behaving?
at 99 degrees outside they hit 147normal driving foot off the pedal it hit 150 wot 139
i did a compression test and thing is within spec my coils are good and so are my plugs i just bought a fuel filter haven't put it on yet
Old 06-20-2008, 07:30 AM
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Originally Posted by USMCFieldMP
Hmmmmm... odd. So the condition is getting worse. That's not good. Vacation is ghey. Work = Man.
i would say its getting progressevly worse but slowly

bad gas? could that be a problem?

Last edited by Altiery54; 06-20-2008 at 07:30 AM. Reason: Automerged Doublepost
Old 06-20-2008, 07:32 AM
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.......... normal driving... just cruising... not sitting at a light... you gain 50* from IAT1 to IAT2? DAMN!

Check to see if your pump is working. What pulley are you on?

Originally Posted by Altiery54
i would say its getting progressevly worse but slowly

bad gas? could that be a problem?
No... bad gas would more than likely only give you knock. And only at WOT really.

Will the car cruise just fine without getting misfires? If so... take that bitch on the interstate and empty that tank. Its worth a shot. Throw some fuel system cleaner in there just in case. I doubt that'll fix it... but its worth a shot.

Last edited by USMCFieldMP; 06-20-2008 at 07:33 AM. Reason: Automerged Doublepost
Old 06-20-2008, 07:36 AM
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Originally Posted by USMCFieldMP
.......... normal driving... just cruising... not sitting at a light... you gain 50* from IAT1 to IAT2? DAMN!

Check to see if your pump is working. What pulley are you on?



No... bad gas would more than likely only give you knock. And only at WOT really.

Will the car cruise just fine without getting misfires? If so... take that bitch on the interstate and empty that tank. Its worth a shot. Throw some fuel system cleaner in there just in case. I doubt that'll fix it... but its worth a shot.
it only missfires less than 2K rpm's. and mostly just at idle
Old 06-20-2008, 07:55 AM
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Hmmmmm... what is your Injector Pulse Width at idle?
Old 06-20-2008, 07:58 AM
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Originally Posted by USMCFieldMP
Hmmmmm... what is your Injector Pulse Width at idle?
i have no idea how to check that bro lol newb!!!!
Old 06-20-2008, 08:04 AM
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Under your option for things to scan on the Interceptor... I forget what it is labeled as... its just 3 letters... lemme run out to my car real quick.

Is there a sticky or thread somewhere that goes through all the functions and options of the interceptor and explains what they do? Half of the things that I can monitor, I don't... because I don't know what the damn abbreviation means!

PW (Pulse Width)... its at the Bottom of the 2nd screen of options, IIRC.

Do you know how to set up the Shift light?

Last edited by USMCFieldMP; 06-20-2008 at 08:05 AM. Reason: Automerged Doublepost
Old 06-20-2008, 08:05 AM
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Originally Posted by USMCFieldMP
Under your option for things to scan on the Interceptor... I forget what it is labeled as... its just 3 letters... lemme run out to my car real quick.

Is there a sticky or thread somewhere that goes through all the functions and options of the interceptor and explains what they do? Half of the things that I can monitor, I don't... because I don't know what the damn abbreviation means!

PW (Pulse Width)... its at the Bottom of the 2nd screen of options, IIRC.

Do you know how to set up the Shift light?
ya i know how to set up te shift light
Old 06-20-2008, 08:13 AM
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Properly? Have you got it to work? Most people don't know to change the Refresh Rate.

I swear... we need a thread that details all the options and features for us.
Old 06-20-2008, 08:15 AM
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Originally Posted by USMCFieldMP
Properly? Have you got it to work? Most people don't know to change the Refresh Rate.

I swear... we need a thread that details all the options and features for us.
lol ya. i dont have my car at work with me so i cant check the pulse width at the moment. when i check it later what should it be at?
Old 06-20-2008, 08:22 AM
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Altiery, I'm back from vacation, it was just a two-three day camping trip. I'll shoot LSJ the tune. Maybe there's somethin I tripped up with the IFR's since mine are wacky too and I'm having a uber version of your problem. All 4 cylinders are misfiring at idle, I stall out when not moving and have to keep my car at 2k rpm to keep the rpms from bouncing from 400-2,000...... I haven't had this problem before. :sigh: Mine may be 02 sensor related. Check your 02 voltage and IPW's on the aeroforce. My O2 voltage goes from the norml 700-900 rhythm then bottoms out but my IPW's don't change.


EDIT: ****, Killernutz borrowed HPT to scan his car. I can't get it back til this evening. Damn, I can't help either of us til then because he has my flash drive that has my files on it. I haven't had a chance to back up your files on my desktop yet.... Bah
Old 06-20-2008, 08:30 AM
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Originally Posted by WickedSS2005
Altiery, I'm back from vacation, it was just a two-three day camping trip. I'll shoot LSJ the tune. Maybe there's somethin I tripped up with the IFR's since mine are wacky too and I'm having a uber version of your problem. All 4 cylinders are misfiring at idle, I stall out when not moving and have to keep my car at 2k rpm to keep the rpms from bouncing from 400-2,000...... I haven't had this problem before. :sigh: Mine may be 02 sensor related. Check your 02 voltage and IPW's on the aeroforce. My O2 voltage goes from the norml 700-900 rhythm then bottoms out but my IPW's don't change.
ha will do man. i kept telling myslef i know it can not be the tune cause ur the man!!!! and we dont want another u know who. so hopefully i can get this thing figured out this afternoon. i'm getting off work at 1 and devoting the rest of today through monday on figuring this bitch out

i'm in no immediate rush man. thats what the work trucks for. on another note my meth will be here next week so i may be making another trip back to u sometime soon

Last edited by Altiery54; 06-20-2008 at 08:30 AM. Reason: Automerged Doublepost
Old 06-20-2008, 08:41 AM
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Take the injectors out and have them flow-benched. I'll put money on that being your problem...
Old 06-20-2008, 08:42 AM
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Originally Posted by Edubs
Take the injectors out and have them flow-benched. I'll put money on that being your problem...
i am going to have my tune looked over today then i called the shop and they cant do that till monday so i have a few last things to check. thanks though bro . i also have a slight feeling that may be the problem
Old 06-20-2008, 08:44 AM
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Originally Posted by Altiery54
i am going to have my tune looked over today then i called the shop and they cant do that till monday so i have a few last things to check. thanks though bro . i also have a slight feeling that may be the problem
I have the same problem as you and I'm certain that it's my injectors. I'm shipping them out to Racetronix next week to be flowbenched and matched up w/ new ones if needed...

Keep us updated w/ your progress and good luck!
Old 06-20-2008, 08:46 AM
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Originally Posted by Edubs
I have the same problem as you and I'm certain that it's my injectors. I'm shipping them out to Racetronix next week to be flowbenched and matched up w/ new ones if needed...

Keep us updated w/ your progress and good luck!
well if u can PM when u find out. can u quickly tell me how urs is acting. and how long of a turn around did they tell u till u get the injectors back? zzp told me from 1-2 weeks atleast


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