Were do I start?
Thread Starter
Junior Member
Joined: Jan 2001
Posts: 46
Likes: 0
From: Lexington, KY, USA
Were do I start?
I am trying to get my engine running smoothly and need some help from you TPI brainiac's. My engine has the following.
355ci, flat top pistons, Sportman II heads,
Comp Cams 12-404-4 (Lift .464, Dur .268op .276 closed), Heddman Headers, Accel Fuel Pump, K&N Air Filter,Stock 91 TPI setup with 7730 ecm. 19lb injectors. Adjustable fuel pressure regulator.
-------------------------------------------
At present I have a rough idle with low vacuum. Engine wants to sputter and has little throttle response at take-off.
Any ideas on were to go and what to look for? I am a newbie to all this ECM stuff and learn a bunch from you guys. I appreciate your help and patience.
Chris
355ci, flat top pistons, Sportman II heads,
Comp Cams 12-404-4 (Lift .464, Dur .268op .276 closed), Heddman Headers, Accel Fuel Pump, K&N Air Filter,Stock 91 TPI setup with 7730 ecm. 19lb injectors. Adjustable fuel pressure regulator.
-------------------------------------------
At present I have a rough idle with low vacuum. Engine wants to sputter and has little throttle response at take-off.
Any ideas on were to go and what to look for? I am a newbie to all this ECM stuff and learn a bunch from you guys. I appreciate your help and patience.
Chris
Senior Member
Joined: Jul 1999
Posts: 851
Likes: 1
From: Shelby Twp., Mi., USA
Car: '84 Fiero ('01 GA interior)
Engine: '96 4.0 Aurora
Transmission: '96 4T80E
My initial thoughts are that you're in for a PROM change. Also, what is the LSA of the cam? 112 - 114 LSA should work fine for the speed density ECM. Any lower could cause erratic vacuume signals. (I think 
)
) 
Thread
Thread Starter
Forum
Replies
Last Post
92camaroJoe
Tech / General Engine
6
Aug 13, 2015 06:07 AM
