problem?? please help

Reply Subscribe

Thread Tools

Search this Thread

Jan 23, 2007 | 07:31 PM

ssrevenge

Thread Starter

Registered User

Joined: Jan 2007

Posts: 5

problem?? please help

ok i got home from work in my truck.. got out and jumped into my 96 t/a and went to get my son from daycare...left the car running while i was there and then went to the post office and shut off the car...i kinda noticed it was missing maybe or stumbling a little bit but didnt pay it any attention cause i just thought it was cold....well i get out of the post office and try to start it and all it did was crank...crank crank crank...walked home and got my truck and came back..still just cranked...finally got pissed off with it and floored the gas while tryin to start...it would try and act like it was gonna start and nothing...so finally got it started by holding the pedal to the floor and got it home...shut it off and wouldnt start back up...any idea's..the car has a new msd opti spark on it..well at least thats what the guy said..anyone had any similar problems? any help would be greatful

Jan 23, 2007 | 08:22 PM

mdacton

Banned

Joined: Oct 2006

Posts: 4,970

From: Goochland, Va.

you need to do some checking first and come back
compression
fuel
spark

check fuel press at the rail with key on engine off....
crank it and check spark...

Jan 23, 2007 | 08:32 PM

ssrevenge

Thread Starter

Registered User

Joined: Jan 2007

Posts: 5

the compression is good...it will run down the run just fine after i get it started...i think it has something to do with the opti

Jan 23, 2007 | 09:31 PM

Injuneer

Administrator

Joined: Nov 1998

Posts: 71,094

From: Hell was full so they sent me to NJ

When you hold the throttle to the floor while cranking, it puts the PCM in "clear flood" mode, where the PCM siugnificantly reduces the fuel flow, to clear a flooded engine. Since it started with your foot on the floor, it would suggest something is flooding the engine. A leaky injector might be the problem.

You might also want to have it scanned for codes. The most common "no start" problem from the Opti is loss of low resolution pulse from the optical sensor, and that will set a diagnostic code, but not necessarily turn on the SES light.

Jan 23, 2007 | 10:09 PM

ssrevenge

Thread Starter

Registered User

Joined: Jan 2007

Posts: 5

would the maf be to blame? i put my ls1 maf on it and thats when it started to mess up..i searched to see if an ls1 maf would work and from what i found they would..but maybe if messed with my a/f....i put my old maf on and seems to be doing a lot better...thanks for all the help..im new to the lt1 game