Diagnose fuel problem

richk55
15

Asked by richk55 Sep 10, 2012 at 07:40 PM about the 1984 Chevrolet Corvette Coupe

Question type: Maintenance & Repair

I am getting no fuel spray from the throttle body injector nozzles when I try to start my 84 Corvette. It is turning over at a normal RPM but no gas.  What the best way to diagnose the problem?

11 Answers

charlottecarguy397
0

Have you checked to see if gas is making it to the fuel rail?

John Saffrahn
19,245

your car has a fuel rail that connects to the intake manifold how are you capable of seeing the injector spray??????????????????????? its not a TBI and the TBI is the only setup that allows you to see the injectors.

John Saffrahn
19,245

check the oil pressure switch

1 out of 1 people think this is helpful.
Rob Vukelich
285

Well there are only a few things that could impede fuel flow. You've got the simple mechanical items like fuel pump, fuel filter and the throttle bodies themselves. If neither one is delivering fuel, then it has to be pump or filter. The filter usually doesn't completely stop fuel flow. It may slow it down at high flow rates but usually does not cause failure to start. That leaves the pump or an electrical issue to power it as mentioned above with oil pressure. Except that no engine has oil pressure at start up, so that is not likely it. But there may be some other sensor or an issue with the computer that could keep it from starting.

Rob Vukelich
285

And yes John, the 84 has throttle body injection.

richk55
15

Is that any way to bypass the sensor system and ignition and apply a jumper to the pump to see if it functions? It has a 3 pin connector and the middle pin has about 11 volts of power to it, but I don;t know what state the other two pins should be in.

1 out of 1 people think this is helpful.
John Saffrahn
19,245

wiring

1 out of 1 people think this is helpful.
John Saffrahn
19,245

procedure to test

1 out of 1 people think this is helpful.
John Saffrahn
19,245

page 2

1 out of 1 people think this is helpful.
John Saffrahn
19,245

page 3

1 out of 1 people think this is helpful.
John Saffrahn
19,245

that is to trouble shoot whether the pump is working and find out why. have fun post if you need aditional help.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Corvette
Looking for a Used Corvette in your area?
CarGurus has 10,998 nationwide Corvette listings starting at $3,395.
ZIP:

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 carGrrl
carGrrl
Reputation 900
#2 Tom Demyan
Tom Demyan
Reputation 790
#3 califcarson
califcarson
Reputation 670
View All

Used Cars For Sale

2015 Chevrolet Corvette For Sale
3,673 listings starting at $55,000
2014 Chevrolet Corvette For Sale
45 Great Deals out of 1,156 listings starting at $47,995
2013 Chevrolet Corvette For Sale
14 Great Deals out of 405 listings starting at $29,995
2012 Chevrolet Corvette For Sale
20 Great Deals out of 324 listings starting at $30,000
2011 Chevrolet Corvette For Sale
11 Great Deals out of 318 listings starting at $26,899