Ryneman

I had my LS1 rebuilt, new connecting rods, pistons, rebuilt heads, new cam, new lifters, push rods, springs, pretty much everything.

I got it all installed in the car and it will not start. It will turn over no problem.

I checked all the plugs, coil packs, fuel pressure, grounds, everything but compression.

When I first started it, it fired right up, idled to 1000 rpms, went up to 1400 rpms and then died. And now it will not start up. Every once and awhile, it will pop like it is trying to start.

The only thing I did not do is soak the lifters. I read on here and my books, soak the lifters, dont need to soak the lifters.

After I could not get it started again, I took the head covers off to check the rockers and springs. All the rockers were tight but I could move the rockers freely on the intake valves. back and fourth from the push rod the the valve.

I even took the fuse's out for the injectors and pulled the plugs and turned it over for about a minute to build oil pressure. nothing

I dont know what else to do except to take the heads off and soak the lifters.

The codes that it is throwing, pulled with HP turners.

[PCM] P1637 - Generator L-Terminal Circuit (Pending) (Old) (History) (Current) (Immature)
[Brake] C0237 - Rear Wheel Speed Signal Erratic (History)
[Brake] U1000 - Class 2 Communication Malfunction (History)
[Restraints] U1000 - Class 2 Communication Malfunction (History) (Immature)
[Restraints] U1016 - Loss of Class 2 Communication with VCM (History) (Immature)
[HUD] U1000 - Class 2 Communication Malfunction (History) (Immature)

06tx4.8

iTrader: (19)

dbl check ALL of ur grounds.....dont keep turning it over and over, unless u pull the fuel pump fuse. it will wash out ur cylinders.

Ryneman

I ohm checked all the grounds. Every ground has prefect continuity at 0 resistance. I took the fuses out for the injectors.

I am still thinking it can be collapsed lifters.

I dont know what else to do.

Ryneman

..bump..

Ryneman

Dang it, 40 plus views and only 1 person is trying to help.

I will just have to start over

eseibel67

iTrader: (10)

It's not the lifters. Don't rip it apart. The good news is that it did run for a short time.

Fuel pressure is good. You checked the coil connectors and the grounds. Did you check each bank for spark at the plugs?

Ryneman

I put a plug in it wire outside the engine. Spark at every coil pack.

racerfox

iTrader: (4)

you check spark?

Ryneman

I sure did

joecar

Are the injectors firing...?

Is the crank reluctor spinning on the crank...?

When cranking, what rpm does the scantool show...?

Ryneman

Injectors are all firing. Crank is brand new. The starter is spinning the engine over at 450 or so rpms

Ryneman

..bump..

Id there anyone in my area that could help me out?

importhater81

maybe the pcm tune is not correct for the cam you have in the engine now.

Paint_It_Black

iTrader: (1)

check the crank sensor?

HotSilverBird

1st guess is the spark plugs are fouled........

Ryneman

If the crank sensor was bad, wouldn't it throw a code??

Why would my plugs be fouled out?

GTO1_OHIO

iTrader: (3)

Sounds like when my map sensor wasn't pluged in.

Ryneman

I wish it was that easy.

I have everything plugged in.

I disconnected the MAF sensor to try to run it with IAT. Still did not start.

1998Z28LOADED

This could be silly but did you drill out the hole on your TB blade to make it bigger?

LS-1Z28

iTrader: (6)

has the pcm been tuned?

I know mine had a difficult time idling and would fire up and shut off if I wasn't giving it any throttle...