issues after exhaust work
#1
Junior Member
Thread Starter
Join Date: Apr 2010
Location: Sault ste. Marie, ON
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 iroc z
Engine: 5.0 TPI
Transmission: t5
Axle/Gears: stock
issues after exhaust work
I just had a set of shorty headers (hooker competition series) ypipe and magnaflow cat back exhaust installed on my car, but now when i am approaching about 4800 in 2nd or 3rd gear in my 87 305 tpi, it acts like im hitting fuel cutoff or something... could this setup have changed anything enough that i need an adjustment of my PROM or maybe i need bigger injectors?? (still have stock 19LBs) help!!!
#2
Member
Join Date: Jan 2010
Location: Big Sandy, TX
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1985 z28, 1994 Sierra
Engine: 350, 350
Transmission: T-5, 4L60E
Re: issues after exhaust work
Check your spark plugs and spark plug wires. When I was changing out my header gaskets I broke the core on two spark plugs and didn't know it. I had a problem similar to yours.
#3
Supreme Member
Join Date: Feb 2010
Location: Orlando
Posts: 1,446
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: issues after exhaust work
I've broken plugs plenty of times when putting in or taking out my headers. You have to look very carefully at each one too. Its just a hairline crack in the porcelain. One of the easiest ways may be to wait untill night time. Get the car somewhere that is extremely dark. Turn the car on and look for blue sparks.
#4
Junior Member
Thread Starter
Join Date: Apr 2010
Location: Sault ste. Marie, ON
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Car: 87 iroc z
Engine: 5.0 TPI
Transmission: t5
Axle/Gears: stock
Re: issues after exhaust work
ill check it out tonight.. it couldnt be spark plug order could it? because when i had mentioned the issue the mechanic said he may have gotten the two plugs on the driver side closest the firewall mixed up... but it drives fine not rough i think i would notice that more right?
#5
Supreme Member
Join Date: Feb 2010
Location: Orlando
Posts: 1,446
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: issues after exhaust work
It would run rough at idle if they were mixed up. However, it never hurts to just go check.
If the mechanic said he may have gotten them mixed up, then that means he let the car leave knowing there was a potential problem with it. Wether this turns out to be your problem isnt the important part. I would find someone new from now on.
If the mechanic said he may have gotten them mixed up, then that means he let the car leave knowing there was a potential problem with it. Wether this turns out to be your problem isnt the important part. I would find someone new from now on.
#6
Supreme Member
Join Date: Oct 2001
Location: NWOhioToledoArea
Posts: 8,113
Likes: 0
Received 5 Likes
on
5 Posts
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Re: issues after exhaust work
The new system could be just not flowing as well.
When I made a side pipe [yes pipe V6] the simple 90* tunr out totally killed the upper RPM band like that, knocked a hole in the end of it so it could flow straight out and back to normal fast n ahrd to redline.
When I made a side pipe [yes pipe V6] the simple 90* tunr out totally killed the upper RPM band like that, knocked a hole in the end of it so it could flow straight out and back to normal fast n ahrd to redline.
Thread
Thread Starter
Forum
Replies
Last Post