'85 Running Rich (VERY)
Thread Starter
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Joined: Jun 2002
Posts: 46,133
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From: Maryville Tn
CI 5 thru 12 Veteran
St. Jude Donor '09 thru '23
NCM Sinkhole Donor
'85 Running Rich (VERY)
My engine is mildly modded (Ported heads, LS-1 cam, longtube headers, chip burned for the mods). I thought the initial reason it was running rich is that I found a blown header gasket. I replaced both header gaskets and it still runs rich. Any ideas guys? Any info would be appreciated.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Originally Posted by H P Bushrod
My engine is mildly modded (Ported heads, LS-1 cam, longtube headers, chip burned for the mods). I thought the initial reason it was running rich is that I found a blown header gasket. I replaced both header gaskets and it still runs rich. Any ideas guys? Any info would be appreciated.
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I had this happen once when I had been working on the engine, I had forgot to plug the connector back in on the maf. Check this connection and even if it's plugged in, give it a shot of contact cleaner and plug it back in.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
It appears this problem is not new with the header gasket replacement.
Lots of things could make it run rich. systematically trouble shooting the possibilities will save you from guessing and throwing money at it. Possibilities include:
A vacuum leak.
A bad fuel pressure regulator.
Leaky injectors.
O2 sensor problems.
TPS problems.
MAF problems.
MAP problems.
ECM problems.
Wiring to almost ANY sensor or the ECM.
Get out your FSM and start following the trouble shooting charts.
RACE ON!!!
Originally Posted by H P Bushrod
I thought the initial reason it was running rich is that I found a blown header gasket. Any ideas guys? Any info would be appreciated.
A vacuum leak.
A bad fuel pressure regulator.
Leaky injectors.
O2 sensor problems.
TPS problems.
MAF problems.
MAP problems.
ECM problems.
Wiring to almost ANY sensor or the ECM.
Get out your FSM and start following the trouble shooting charts.
RACE ON!!!
Thread Starter
Moderator Emeritus
Joined: Jun 2002
Posts: 46,133
Likes: 111
From: Maryville Tn
CI 5 thru 12 Veteran
St. Jude Donor '09 thru '23
NCM Sinkhole Donor
Possibilities include:
A vacuum leak.
A bad fuel pressure regulator.
Leaky injectors.
O2 sensor problems.
TPS problems.
MAF problems.
MAP problems.
ECM problems.
Wiring to almost ANY sensor or the ECM.
Get out your FSM and start following the trouble shooting charts.
RACE ON!!![/QUOTE]
Thanks for the input guys. I'll start checking things on my next day off. Greatly appreciated! Stay safe.
A vacuum leak.
A bad fuel pressure regulator.
Leaky injectors.
O2 sensor problems.
TPS problems.
MAF problems.
MAP problems.
ECM problems.
Wiring to almost ANY sensor or the ECM.
Get out your FSM and start following the trouble shooting charts.
RACE ON!!![/QUOTE]
Thanks for the input guys. I'll start checking things on my next day off. Greatly appreciated! Stay safe.
