I cant seem to figure out why.car has full tune up,plugs set at 0.54 timing@14 deg spout out,no codes in memory or running ,passed cyl balance test,good uniformed compression.Im thinkin that this may tie into my not so good MPG and the somewhat gassy smell when it first starts.I pulled the vac line off of the FPR thinking that there would be some gas in the line but there wasnt.BTW the plugs looked fine,really clean.but It seems like too much fuel is entering the chambers.could it be the fuel pump or the regulator,or a leaky injector?BTW also cleaned Mass air and set tps.
car cranks 5-7 revolutions before starting
- Thread starter rockyracoon
- Start date
Jaswir
Member
might be the fuel pump... if its taking 5-7 revolutions to crank over... when u turn the key on does ur fuel pump prime??
95GTV8
New Member
i've got the same problem, although mine is more random. Sometimes she starts up very nicely and sometimes it takes along time and it sort of sputters to life. I just changed the fuel filter, so do you think it could be the fuel pump?
Cycle the key on and let the pump prime. THen turn the key off and repeat. Do this a time or two before starting for the first time and see how it starts.
I think you made a typo - plugs go in a 0.054".
Good luck.
I think you made a typo - plugs go in a 0.054".
Good luck.
mine never sputters,it just routinely cranks that many revolutions before it kicks.Oh yeah Hissin50, 0.054.But my prob seems like too much fuel cause like i said when it first starts up you can smell gas.could a bad pump deliver too much or would that be a regulator?.anyone know the proper procedure to check the pump and regulator.I have a gauge to check the pressure, just havent used it yet.
One should see 30+ PSIG of fuel pressure with the vac line attached. At simulated WOT (vac line removed) you should see 38-39 PSI.
If you have stock injectors, you shouldnt have too much cranking-fuel. Guys with the fat squirters (read 30# on up, generally) might have too much cranking fuel and tune some of it out.
It sounds like you still run cats, right? Otherwise the fuel smell is kinda normal.
FWIW, flooring the gas pedal while (AND ONLY WHILE) cranking cuts the injectors. This would be a means of testing your 'too much fuel' theory (I dont think this is the case, and the fuel smell is a result of another issue. The fuel smell comes from extended cranking). But you know best - you are there experiencing it. I just try and convey my thoughts from a keyboard, which is like me commenting on your golf swing from my computer.
Good luck.
If you have stock injectors, you shouldnt have too much cranking-fuel. Guys with the fat squirters (read 30# on up, generally) might have too much cranking fuel and tune some of it out.
It sounds like you still run cats, right? Otherwise the fuel smell is kinda normal.
FWIW, flooring the gas pedal while (AND ONLY WHILE) cranking cuts the injectors. This would be a means of testing your 'too much fuel' theory (I dont think this is the case, and the fuel smell is a result of another issue. The fuel smell comes from extended cranking). But you know best - you are there experiencing it. I just try and convey my thoughts from a keyboard, which is like me commenting on your golf swing from my computer.
Good luck.
My camaro does this. I checked fuel pressure and it primes fine, but as soon as if finishes priming, the fuel pressure dropps off fast, it should hold. I am ordering a new fuel pressure regulator because they are cheap and commonly go bad on GM's, but I dred the fuel pump on that thing. (F-body gas tank, the differential is in the way) GM, Ford, Chrysler, they all use the same fuel system and parts. So check the fuel pressure and see what it does. It could be bad compression as well, but lets hope not. Also, check the TPS voltage.
rd
Founding Member
This is what Ford calls an extended crank.
One potential cause is the check valve in the fuel pump fails and as soon as the car is off, the fuel pressure drops to nothing. It takes that much time for it to build back up when you start the car.
If possible, put a fuel pressure gage on it. If it is fine with the car running, but drops immediately when you turn it off, the fp check valve is a good bet.
Its part of the pump so you have to change the pump.
One potential cause is the check valve in the fuel pump fails and as soon as the car is off, the fuel pressure drops to nothing. It takes that much time for it to build back up when you start the car.
If possible, put a fuel pressure gage on it. If it is fine with the car running, but drops immediately when you turn it off, the fp check valve is a good bet.
Its part of the pump so you have to change the pump.
The FPR can also be responsible for a pressure drop as soon as the key is turned off.
Carefully crimping the return line with fuel injection line crimps at the same instant as turning the car off can help narrow things down.
Good luck.
Carefully crimping the return line with fuel injection line crimps at the same instant as turning the car off can help narrow things down.
Good luck.
