rrdo

Hello,

Got a 1995 K1500 4WD with a 5.7L. Just changed the intake manifold and put on a new Holley throttle body. Went to start it and nothing, Because we pulled the distributor, we reset the timing (many times over). Ensured the timing and firing order was correct. Still nothing. Spent two evenings trying to start it, but still nothing. The fuel injectors are dumping plenty of fuel. Just does not want to start. Decided to pull the dipstick and smelled fuel. From all of our attempts to start, the fuel has seemed to dump in the crankcase (or at least we are smelling it on the dipstick - very strong).

So, we re-pulled the intake today and inspected for a crack in the intake or if the new intake gaskets had slipped during install. There seems to be no evidence of either. However, we do not understand why the fuel is in the oil? We are also lost that the engine will not start. It cranks all day long, but no start. We had what seemed like a couple of hits, but no start. We even increased the fuel pressure thinking the new Holley was not dumping enough fuel. Also, after all the attempts to start, we pulled the #1 and #4 plug and they were dry as a bone. The engine just seems to be getting no fuel in the cylinders to fire off. We cannot figure this one out. Any help would greatly appreciated. Thanks.

David

rutler101

do you have good spark?? you said they were dry but sparking is good too lol

rrdo

Yes, we checked spark from the coil and from the #1 plug. With #1 plug, as we cranked, the spark seemed slow (maybe 1.5 - 2 seconds apart) as the starter turned. I realize the RPMs are low, but for some reason you think it should spark faster?

Would a Hypertech chip on the PCM retard or advance timing? I ask because we had to reset the timing by bringing #1 to TDC and then making sure the firing order was correct. Even if we missed a tooth, you would still think it would start. Unless, the chip has the timing skewed. Thanks for your help.

David

shawnvw

when you timed the motor up, did you line it up to TDC on the compression stroke? or exhaust stroke?.......you should have it TDC on compression stroke

rrdo

Yes, TDC is on the compression stroke. We used a compression gage to find the compression stroke verses the exhaust stroke. In doubt, we even pulled the distributor and went 180 degrees out just to verify. No luck.

We are starting to wonder if the performance chip installed on the PCM is affecting the timing when trying to set from scratch? Has anyone experienced this? Plus, what explains the fuel in the oil? Thanks.

David

slc10844

Try removing the chip and put the computer in the stock condition. Fuel in the oil is usually an indication of an excessively rich fuel mixture. The injectors may be dumping too much fuel. Fuel in the oil has the potential of wiping out bearings. You may want to consider changing the oil before starting the engine. Have you checked fuel pressure you have against what is required for the Holley set up? Is the Holley TB the proper one for your application? Was the manifold and TB new or used? You may end up pulling the manifold and look for an installation problem.