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
17,485

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
17,485

check the oil pressure switch

1 out of 1 people think this is helpful.
Rob Vukelich
275

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
275

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
17,485

wiring

1 out of 1 people think this is helpful.
John Saffrahn
17,485

procedure to test

1 out of 1 people think this is helpful.
John Saffrahn
17,485

page 2

1 out of 1 people think this is helpful.
John Saffrahn
17,485

page 3

1 out of 1 people think this is helpful.
John Saffrahn
17,485

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 11,260 nationwide Corvette listings starting at $3,997.
ZIP:

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 carGrrl
carGrrl
Reputation 880
#2 Tom Demyan
Tom Demyan
Reputation 760
#3 califcarson
califcarson
Reputation 620
View All

Related Models For Sale

Used Chevrolet Camaro"
582 Great Deals out of 33,001 listings starting at $1,795
Used Ford Mustang"
904 Great Deals out of 29,066 listings starting at $1,982
Used Porsche 911"
168 Great Deals out of 3,348 listings starting at $12,200
Used Dodge Challenger"
307 Great Deals out of 18,960 listings starting at $11,995
Used Dodge Charger"
567 Great Deals out of 28,415 listings starting at $4,900
Used Mercedes-Benz SL-Class"
126 Great Deals out of 2,869 listings starting at $4,400
Used BMW 3 Series"
1,439 Great Deals out of 38,537 listings starting at $1,688

Used Cars For Sale

2014 Chevrolet Corvette For Sale
38 Great Deals out of 1,303 listings starting at $46,950
2013 Chevrolet Corvette For Sale
19 Great Deals out of 394 listings starting at $31,995
2012 Chevrolet Corvette For Sale
15 Great Deals out of 298 listings starting at $30,800
2011 Chevrolet Corvette For Sale
12 Great Deals out of 365 listings starting at $28,993