Car takes several cranks to start
02-05-2016, 08:35 PM
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Car: 1988 Pontiac Firebird Formula
Engine: 5.7 TPI
Transmission: 700R4
Re: Car takes several cranks to start
What is fuel pressure doing?
Does the mere act of lightly pressing the gas make it start on the first attempt?
Does the mere act of lightly pressing the gas make it start on the first attempt?
02-05-2016, 09:32 PM
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02-06-2016, 03:19 AM
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Car: 1991 Z28 1LE
Engine: LS1
Transmission: T56
Axle/Gears: 3.42
Re: Car takes several cranks to start
I would start with what ploegi said and check your fuel pressure for leak down. Any reason you replaced the FPR? When the fuel system primes it should hold that pressure, if the pressure begins dropping then you have a bad pressure regulator or a leaky injector.
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02-06-2016, 09:30 AM
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02-06-2016, 09:31 AM
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Re: Car takes several cranks to start
I changed the FPR because my car had hydrolocked with gas.
02-06-2016, 09:47 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Car takes several cranks to start
around 1/3 pedal is adding fuel while cranking and to the floor is clear flood mode.
02-07-2016, 11:31 AM
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Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: Car takes several cranks to start
what is your starting procedure? it might take that long for the pump to build enough pressure to start it so if you just ramrod the key straight from "off" to "start", it's gonna take a few revolutions to light off...
what happens if you turn the key to "run" and let it prime a few seconds before hitting the key?
what happens if you turn the key to "run" and let it prime a few seconds before hitting the key?
02-11-2016, 06:44 PM
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Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Re: Car takes several cranks to start
What is clear flood mode?
02-11-2016, 06:45 PM
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Car: 1988 Pontiac Firebird Formula
Engine: 5.7 TPI
Transmission: 700R4
Re: Car takes several cranks to start
Step hard on the gas while cranking, and the ECM interprets that as "clear flood" and DRAMATICALLY cuts back on how much gas it squirts.
02-11-2016, 08:44 PM
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Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Re: Car takes several cranks to start
I didn't know that. That's good to know just in case.
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