cranks to much before starting when hot
#1
cranks to much before starting when hot
i have 91 z l98 , when its cold its starts right up, sometimes i think it starts to fast. but when its t running tempature and i try to start it up, its cranks alot before starting. its a healthy crank. i thought i could of been a leacky injector, but am i wrong?
#2
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Join Date: Feb 2011
Location: callander ontario
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Car: 87 iroc
Engine: 305 tpi
Transmission: auto
Axle/Gears: 3.23 limited slip
Re: cranks to much before starting when hot
turn the key to on but not start. give it a few seconds then crank it over and see if it starts right away or the same. not uncommon for this to happen to older fuel injected cars
#3
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Re: cranks to much before starting when hot
I think the most common cause is injectors leaking fuel into the cylinders after you shut the engine off.
If this is the case then check your oil for fuel contamination, because fuel in the oil can eventually trash your bearings.
With leaky injectors you can shut the engine off hot, then start it right back up within a minute or two and it starts just fine, but after sitting 5 or 10 minutes it cranks for a while before starting. After an hour or more of sitting it starts fine once again, even if still hot.
If this is the case then check your oil for fuel contamination, because fuel in the oil can eventually trash your bearings.
With leaky injectors you can shut the engine off hot, then start it right back up within a minute or two and it starts just fine, but after sitting 5 or 10 minutes it cranks for a while before starting. After an hour or more of sitting it starts fine once again, even if still hot.
#4
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Re: cranks to much before starting when hot
You might want to check the resistance on the injectors both hot and cold. The stock injectors on these cars are extremely prone to coil failure. They may ohm out fine when they are cold, however it is common for them to shut down when hot.
www.southbayfuelinjectors.com
516-492-6504
www.southbayfuelinjectors.com
516-492-6504
#6
Re: cranks to much before starting when hot
i cant see no gas on my oil. but i think my bearings are destroyed since last time i did oil change, found little pieces of metal on old oil
#7
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Car: 1985 Trans-Am
Engine: 305 LG4 4bbl
Transmission: T-5
Axle/Gears: 3.27 Limited Slip
Re: cranks to much before starting when hot
I'm not familiar with TPI cars, but what about your fuel pressure regulator? easy cold starts, hard warm starts sounds like the FPR.
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#8
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Re: cranks to much before starting when hot
I've never had a fuel pressure regulator cause that problem. I have had it happen from a bad coolant temperature sensor. If that goes bad, it tells the computer it's -40 outside. When the car is cold it can still start, but if it's warm, it floods it.
#9
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Re: cranks to much before starting when hot
The ohms on the injectors should be a minimum of 12.0 or above.
#13
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Re: cranks to much before starting when hot
Originally Posted by 1roc89z28
have to pull the fuel rail again...
#16
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Re: cranks to much before starting when hot
Originally Posted by 1roc89z28
how if the gas lines prevent me from lifting the fuel rail?
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