johndorsey

91 Acura Legend Sedan 155000 miles

I HAVE NO SPARK AND NO FUEL PUMP NOISE. MY CHECK ENGINE LIGHT DOESNT COME ON OR IS DIM THE BULB IS GOOD CAR WONT START. CRANKS BUT WON'T START.

Repairs Done:
Main Relay
Fuel Pump
ECM
Under The Dash Fusebox

Car still has the same problem. What do I do next?

bob01721

Have you checked all the fuses?

BTW, when you say it "won't start," do you mean... (1) engine cranks but won't run, or (2) engine won't even crank?

johndorsey

CRANKS BUT WON'T RUN/ Engine Turns but wont run.

bob01721

Have you checked ALL the fuses?

Do you have/can you use a voltmeter?

johndorsey

Checked all fuses and they are good.

johndorsey

took out fuse 13 and MAIN RELAY made buzzing sound and MIL Light came on.

bob01721

So you're down to a simple no-spark (engine cranks but won't run) problem?

If that's the case, chase the spark back. If you don't have spark at the plugs, see if you have it coming out of the coil (into the distributor). If you DO, then the problem is in the distributor (cap? rotor?). If there's no spark coming out of the coil, then suspect the coil or (more likely) the igniter.

johndorsey

I will check if I have spark again, but I know I dont have fuel. I have a 12v line to the fuel pump that I put to a pos at Ign just to hear the pump kick in. I Think I still have no spark and i know there is no pump but will test spark.

johndorsey

Got Spark..... Have no power to fuel pump.... bought another Main Relay...Still no power to fuel pump and no MIL light. Going to check wires at ECM.

bob01721

Not exactly sure where the ECM is on a 91 Ledge, but it may be easier to check for the Vref at the TPS on the throttle body. If you have 5V there, you can safely assume that the ECM has good voltage and ground.