90 auto. camaro rs v8. My fuel pump won't pump, but it will do the two second prime. I can prime it several times till the pressure is high enough to start the car but once started the fuel pump will not pump. My car has been switched to carb but i still have all the same fuel delivery equipment as fi. I have replaced the fuel pump, the fuel filter, can't find any blown fuses under the dash, and I also tried replaceing the little black box under the hood on the driver side close to the fire wall that says ED & CAF with some funky looken squigally lines between the two sets of letters and also had some number above that. there were 2 of these boxes identical to each other but I only tried replacing one which had no affect, should i try replacing the other one also(what is this box called)(I got mine off another camaro)? If i hook the + battery terminal to the red lead wire under the hood the fuel pump will pump so I can drive it but Im looking for a permanent fix. What else can be wrong
2007-09-26 06:16:45 · 4 answers · asked by nick 1 in Cars & Transportation ➔ Maintenance & Repairs
GM uses a oil pressure switch to disable the fuel pump if you loose oil pressure.
It's mounted behind the distributor and a real ***** to get to.
Make sure it's plugged in, and make sure you do actualy have oil.
It's possible the pressure switch is bad, or damaged.
2007-09-26 06:24:31 · answer #1 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
If you went from a fuel injection system to a carburator, then you need to find a way for the fuel pump to know the engine wants gas, the accelerator used to inform the F/I system that it needed to pump fuel, a carb doesn't do that. In a 90 Camaro, you have a very primitive diagnostic system and the new fuel pump you put in probably is not communicating with the carburator. Go to a custom shop that deals with racing conversions and nitro jet, they will be able to bypass and add a computer monitor to engage the fule pump when you accelerate.
2007-09-26 16:08:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You might have an electrical problem other than the fuses you mentioned or you may have a clogged fuel line. Either way it doesn't sound cheap. You have to weigh what it is costing you to keep your 1990 Camaro on the road compared to what it would be to get a new car with a nice warranty. Or a good used one. Again, with a nice warranty.
My advice? Sell your Camaro for what ever you can get out of it. SOMEONE will buy it. Then get something newer. It's the "permanent fix" that you wanted.
Do this AFTER you get another car, of course, so you're not hoofing it everywhere. :D
2007-09-26 13:27:23 · answer #3 · answered by Anonymous · 0⤊ 0⤋
do this run a line from the battery to under the dash install a toggel switch and then run a line from the pump to the switch cutting the pump on manually.. you have a short in the other wiring somewhere.. and unless someone know this trick the vehicle cant be driven by just anyone
2007-09-26 13:24:49 · answer #4 · answered by Anonymous · 0⤊ 0⤋