1979 Eldorado v8 350 no start

60

Asked by TATL Sep 07, 2015 at 01:19 PM about the Cadillac Eldorado

Question type: Maintenance & Repair

V8 350 non diesel with port fuel injection. Ignition system OK after diagnosis
(fire all the way down to the plugs) so can a TPS sensor create a no start
situation?

11 Answers

60

Have not tried the starting fluid yet and from what I have read I agree about the two fuel pumps. I am not sure it could have hopped time (the car has been parked for over 9 years and only started occasionally) So where I am headed next is to see if the aux fuel pump has power and go from there. Do you have any other suggestions?

2 people found this helpful.
60

Tried start fluid and the engine did start for a few seconds so I know it is fuel related. Any suggestions?

2 people found this helpful.
60

With my luck the main pump in the tank will be the problem and I get to drop the tank when it is full of gas LOL...Thank you Jim

1 people found this helpful.
60

Hello again Jim. Scenario #2 Still no start and it has fuel (I pressed in the plunger on the test port on the fuel rail and fuel sprayed out quite substantially and when I put some gas down the throttle body it did start and run for around 1 second or so. Does the ignition control module control the fuel injector pulse? I have also done nada with the TPS sensor. At this point I am not sure the injector pulse signal is there or the injectors are not working for some other reason. Suggestion?

60

Also, FYI I did take the ignition module out and had it tested and it tested OK.

60

Another thought I had is that if the electrical checks out down at the injector can the injector itself go bad? Remember this car has been parked in excess of 10 years so is there some mechanical component in the injectors that can go bad?

60

Thanks Jim for your suggestion and that is precisely what I am doing next. Would a 1979 Eldorado have a crank position sensor? It has the Oldsmobile non diesel V8 350 in it and is there a cleaner or procedure to clean out the injectors if it passes the noid light test?

60

Thank you Jim, you have been quite helpful. I am praying that the problem is in the electrical and not actually the injectors. Injectors for that car are expensive :-(

1 people found this helpful.
10

It is likely one or both of your temperature sensors. you may get it to fire by rapidly pumping thee gas pedal while cranking. This pulses the injectors 20 odd times per push.

Your going to ruin the engine by cranking it over to much ,if it starts it will spin a bearing the oil is diluted with gas from cranking it over drain oil and check

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