Pig Rich Jimmy

[etriebe]

Hello I just picked up a 93 jimmy with a w engine in it. I drove it for one weekend and was racing a civic and started hearing a knock. Damn always blow em up racing, anyway put a new engine in and it ran great for about a week. I had a coolant leak so i fixed it and ran over to the car wash and hosed off the engine. ran fine for about two hours then it wouldnt idle and puff smoke out the back when i gave it some throttle. I had a bunch of left over parts from the other engine so first thought was that damn spider injector so i pulled the plenum and removed all nozzles and had my buddy crank it and noticed #4 was squirting a little more than the rest of them so i swapped it. still rich. swapped map. still rich. unplugged ect to see if it changes. nope. brought the scanner home tonight and looking at it the only thing i see weird is when in open loop the a/f ratio goes up to 16.0 and when it goes closed it suddenly drops to 14.7 I don't know where to go from here, any help i guess would help. Thanks in advance oops no codes

 

[MikeMcNair]

Re: Pig Rich Jimmy

for starters, thats lean, not rich.

try fuel pump, and adjustable fuel pressure regulator.

i just had the SAME issue, and the pump and regulator cured it.

 

[1madgumby]

Re: Pig Rich Jimmy

Pump !!!!

 

[etriebe]

Re: Pig Rich Jimmy

damn i always get block learn and int backwards (as in up or down) well i had already checked fuel pressure and it was good i just went under it and pulled the filter off and it was clogged so ill be off to napa thanks everybody

 

[nitrodrip]

Re: Pig Rich Jimmy

Am I the only one that thought this was going to be a bad mouth post against Jimmy? :dunno::rotf:

 

[etriebe]

Re: Pig Rich Jimmy

Am I the only one that thought this was going to be a bad mouth post against Jimmy? :dunno::rotf:

HA Thats great didn't even think about that.

Well I am still thinking rich and maybe I was reading the wrong pid on the scanner. Damn thing still won't idle runs rough, puffing black out the back. it will idle ok if I unplug the pcv valve and the heater control off the intake but it has no power.:dunno::dunno::dunno:

 

[etriebe]

Re: Pig Rich Jimmy

Well i hooked it up to the emissions machine and with every thing back together (all vacuum lines hooked up) it had 1500-1700 ppm hc's i'd say thats pretty rich.

 

[92TYPHOON937]

Re: Pig Rich Jimmy

computer my cavalier i used to have ran really rich replaced all kinds of things then got another comp fixed magically

 

[etriebe]

Re: Pig Rich Jimmy

Well went out to the junk yard and got an ecm out of an astro van with the same ecm number plugged it in and, same thing:tdown:. checked vacuum at an idle and had 15" HG and it was steady. Turd box S15, just throwing it up on ebay:rant: