Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Fuel pump problem in caprice LS 1990

(1990 Chevrolet Caprice)
in Clinton, IA on May 27, 2014
I have a caprice LS 1990. It takes 3 times start to run the engine. I check when I put the key in acc mode no gas comes to it's injectors but when I turn the key to start the car after 2 or 3 times of starting it run. I also check the pump connectors behind the rear bumper. When the key is in acc mode no voltage comes but when I start it come 12 volt. Please show me how can I fix it.
Displaying 3 answers & 3 comments
Popular Answer
on May 27, 2014
Pump is NOT supposed to run with key in the acc position!! ..... Even in the on position it only runs 2 seconds and then cuts off until enging is cranking or key is cycled off... on again!.... Have a mechanic test the fuel system pressure and run a scan test .... or cycle key 3 times, start it up and drive on...
Sign in to reply
on May 27, 2014
Tanx, but when I put the key in on position the pump doesn't work even for 1 sec. And the pump wires doesn't show any voltage. After I start for 3 times and more gas comes to the back of injectors and before that there is no gas in fuel line from pump to injectors. I also test to put the key in on position 2 or 3 times before start the car but it doesn't help , as I notice no voltage comes to pump in on position.
on May 27, 2014
You got a tricky one that's for sure...
on May 28, 2014
I didn't get you, what do you mean? My English isn't very good and I don't understand what you mean. Please explain how can I fix it or which part should I change with new one.
of Greg's Orange Auto on May 27, 2014
agree with #1 answer
Sign in to reply
on May 27, 2014
Agree with #2 , ..................nevermind.............
Sign in to reply
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I have a 5.7l sbc 350 out of a 1993 chevy caprice (police package) that has recently been giving me some problems. af...
The digital speedometer and odometer used to just phase in and out. bang it hard and it would come back on. sometim...
Didn't find what you were looking for?