My car just turns but never starts

Tiny
JERRY1993
  • MEMBER
  • 1991 DODGE STEALTH
  • 3.0L
  • V6
  • TURBO
  • AWD
  • MANUAL
  • 99,400 MILES
My car was sitting for 10 years with a bad motor and I put a new engine and went to start it and the fuel gauge saids its empty so I put gas and doesnt move and I cant hear the fuel pump turn on. So I dont know if its a relay that causes the gauge and pump to not work or the pump that its rusty
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Friday, February 7th, 2014 AT 10:47 AM

9 Replies

Tiny
CARADIODOC
  • EXPERT
The fuel pump should only run for one second after turning on the ignition switch, then again during engine cranking. It's powered through a fuel pump relay or the automatic shutdown (ASD) relay. If the pump doesn't run at all, and the gauge stays on "empty", the wiring is the main suspect. Look for a connector that get left unplugged, or a place where a mouse chewed through the wires.
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Friday, February 7th, 2014 AT 11:14 AM
Tiny
JERRY1993
  • MEMBER
I took the entire wiring harness from the engine out when I put the new motor and there was nothing damage and it has all the grounds on the engine too. So you think it might be the fuel pump cause the car was sitting for 10 years
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Friday, February 7th, 2014 AT 11:26 AM
Tiny
CARADIODOC
  • EXPERT
Anything is possible but the fuel pump would be my last suspect. Find the fuel pump relay and bypass it so you can troubleshoot the circuit without having to crank the engine. It should look like the left one in this drawing. Remove the relay, then use a piece of wire or a stretched-out paper clip to jump terminals 30 and 87 together. If you see a tiny spark, the wiring is okay and the pump is trying to run. If there's no spark, the brushes in the pump motor could be open or there's a wiring problem, most commonly by the tank.
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Friday, February 7th, 2014 AT 12:04 PM
Tiny
JERRY1993
  • MEMBER
I try it and nothing it doesnt trun on and the gauge still down even though I put $20 in gas. So you think just to replace the pump
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Friday, February 7th, 2014 AT 1:39 PM
Tiny
CARADIODOC
  • EXPERT
No professional likes throwing random parts at a problem. I read way too often when someone replaces the fuel pump and has the same problem. The first thing to do is check for spark. Don't get hung up on the first thing you find missing, ... Fuel pressure in this case. If you don't have spark, we have to look for what the two systems have in common.

If you do have spark, my next step would be to leave the jumper in the relay socket, then test for voltage at the fuel pump connector. A test light will be more accurate in this case than a voltmeter. If you find 12 volts there, look for a corroded ground wire. Remember, you have two different problems, a dead fuel pump and a dead fuel gauge. The only thing the two circuits have in common is the ground wire.
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Friday, February 7th, 2014 AT 6:45 PM
Tiny
JERRY1993
  • MEMBER
I try everything even add more ground wires and still the pump never turns on and the gauge still doesnt work and even the gas light doesnt turn on so I dont know what to do now
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Sunday, February 9th, 2014 AT 9:08 AM
Tiny
CARADIODOC
  • EXPERT
First of all, check for spark. If you don't have that, there's no point in working on the fuel system. If there is no spark, measure the voltage on the ignition coil. A test light works better than a voltmeter because most voltmeters don't respond fast enough. You should see 12 volts there for just one second after turning on the ignition switch, then it should come back during engine cranking. Holler back with the results.
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Sunday, February 9th, 2014 AT 4:49 PM
Tiny
JERRY1993
  • MEMBER
I have spark and everything turns on. Its just no gas getting to the motor and also the gauge and gas light dont work
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Sunday, February 9th, 2014 AT 4:58 PM
Tiny
CARADIODOC
  • EXPERT
Dandy. Next, test for 12 volts the same way on the fuel pump wire. I'm sorry I don't have the service manual for your model so you'll have to try each wire.
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Sunday, February 9th, 2014 AT 5:22 PM

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