Author Topic: Newly rebuilt engine not running well (Read 5861 times)

badboypolar · « **Reply #15 on:** March 29, 2007, 11:53:16 AM »

How do you reset the ECM?

Spark wires are hooked up correctly.

romkasponka · « **Reply #16 on:** March 30, 2007, 10:59:23 AM »

disconect battery for 1-2 minutes..

BrandC · « **Reply #17 on:** March 30, 2007, 12:02:39 PM »

Also, make sure your ICV is able to work well and the door moves freely. Adjust your throttle cable if you haven't already. Last night I was working on my TB delete and the car went haywire b/c the ICV still had WD-40 from cleaning it AND my throttle cable was adjusted too tightly.

DOUBLE CHECK all connections like everyone mentioned. After I got everything squared away, somehow the ICV hose that is underneath the intake manifold disconnected! It ran like crap and scared the shit out of me at 4am lol.

badboypolar · « **Reply #18 on:** April 02, 2007, 03:15:34 PM »

Found some issues. Inlet fuel hose (to the fuel rail) was leaking. Surprised me seeing as how it was brand new and is steel braided. Fixed that. Upon having to fix that, I found oil all over the inside of my intake runnners which was clean before I put it on. So I'm going to install my catch can before I start it again as I think it was sucking oil in from the valve cover.

Compression check came out
1) 220
2) 215
3) 215
4) 235

RED IS 91 · « **Reply #19 on:** April 02, 2007, 04:52:52 PM »

Quote from: badboypolar;22733

Found some issues. Inlet fuel hose (to the fuel rail) was leaking. Surprised me seeing as how it was brand new and is steel braided. Fixed that. Upon having to fix that, I found oil all over the inside of my intake runnners which was clean before I put it on. So I'm going to install my catch can before I start it again as I think it was sucking oil in from the valve cover.

Compression check came out
1) 220
2) 215
3) 215
4) 235

Bentley states that compression should be between 142-156 ...
When I checked mine it was around 150 .
How did yours get so high ?

Alpine003 · « **Reply #20 on:** April 02, 2007, 09:43:30 PM »

Quote from: RED IS 91;22742

Bentley states that compression should be between 142-156 ...
When I checked mine it was around 150 .
How did yours get so high ?

Probably checked it cold. They tend to be in the 200-210 range on the avg for used motors.

badboypolar · « **Reply #21 on:** April 03, 2007, 09:56:41 AM »

Well for one the head was warped and subsiquently has .010 removed from it to make it true and flat. But I bought a one sized bigger head gasket hoping that would make up for how much was removed. I will need to check my AFR by wideband now to see if I need to go up one size on my injectors to compensate for the higher compression.

And the whole engine has been rebuilt, so it's not used. It's got barely 2 gallons of gas run through it and hasn't run smoothly yet.

gearheadE30 · « **Reply #22 on:** April 03, 2007, 10:25:51 AM »

Sounds like the intake cam may be retarded. I read that if they are a toothe retarded then these symptoms will show, including rough idle and a lack of willingness to rev. I'll try to find a link..

Good luck with the rebuild

badboypolar · « **Reply #23 on:** April 03, 2007, 10:47:35 AM »

Dang I forgot to check if the cam was good with the timing chain. I only checked the cam timing itself. Guess I have to pull that stupid valve cover again.

It's one thing after another...