I HAVE CHEVY 4.3 WILL NOT START

Asked by Sep 22, 2013 at 01:33 AM about the Chevrolet Silverado 1500

Question type: Maintenance & Repair

I  HAVE A 98 CHEVY 1500 EX CAB THAT SHUT OFF I PUT IN A NEW FUEL
PUMP,PUT IN NEW SPIDER INJECTOR  IM GETTING GAS TO INTAKE AND 60 PSI
PRESSURE.  BUT WILL NOT CRANK UNLESS U GAS IN THROTTLE BODY THEN IT
RUN TILL GONE , RELAY REPLACED CAN ANY ONE HELP

5 Answers

sounds like a faulty TPS~

5 of 5 people found this helpful.

the tip off is when you've got to be extreme with the pedal to get it to run...that can only mean one thing~~~

19 of 19 people found this helpful.
116,545

Is that a vortex engine? if so DO NOT manually put gas in the throttle body. If you do and it backfires thru the intake even just a little you will be replacing the whole intake. They are made of plastic and will crack if it backfires. I learned this the hard way when my fuel pump went out on mine. Tested it the old school way by putting gas in throttle body. It cranked and backfired. Replaced the fuel pump and still would not crank. Inspected intake and saw where it had blasted plastic pieces all over because of the back fire. Replaced intake and it started right up.

5 of 5 people found this helpful.
72,495

Are the fuel injectors spraying? Check to make sure you're getting the "trigger signal" to each injector. Check for good clean grounds in the engine compartment. Check all your fuses including the ones in the engine compartment. HTH. -Jim

3 of 3 people found this helpful.
10,965

Vortec. You will need to check the cam position sensor in the distributor. The PCM needs to see a certian RPM during engine cranking before it starts injecting fuel. If there is no signal there will be no fuel. This is very common on the older TBI engines, but does happen on the Vortec's too. (FYI for other people reading if you have a TBI it is called a pick-up coil (in the distributor) which it's signal is sent to the PCM via the ignition control module, the module usually fails on these).

6 of 6 people found this helpful.

Your Answer

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 175,329 nationwide Silverado 1500 listings starting at $955.

ZIP:

Chevrolet Silverado 1500 Experts

  • #1
    John Carson
    Reputation
    2,780
  • #2
    Rowefast
    Reputation
    2,080
  • #3
    Andrew Olsen
    Reputation
    1,810
View All

Related Models For Sale

Used GMC Sierra 1500
1,228 Great Deals out of 64,898 listings starting at $999
Used Ford F-150
3,302 Great Deals out of 224,487 listings starting at $1,200
Used Chevrolet Silverado 2500HD
395 Great Deals out of 30,738 listings starting at $1,995
Used Dodge Ram 1500
411 Great Deals out of 11,096 listings starting at $1,500
Used Toyota Tundra
704 Great Deals out of 34,374 listings starting at $1,500
Used Toyota Tacoma
722 Great Deals out of 45,870 listings starting at $2,500
Used Ram 1500
1,418 Great Deals out of 121,720 listings starting at $5,900
Used Chevrolet Tahoe
828 Great Deals out of 42,143 listings starting at $1,987
Used Chevrolet Colorado
344 Great Deals out of 38,619 listings starting at $1,595
Used Ford F-250 Super Duty
449 Great Deals out of 49,398 listings starting at $1,899
Used Chevrolet Camaro
441 Great Deals out of 31,892 listings starting at $1,450
Used GMC Sierra 2500HD
109 Great Deals out of 14,293 listings starting at $2,799
Used Ford Mustang
594 Great Deals out of 39,960 listings starting at $1,895
Used Dodge Charger
472 Great Deals out of 34,069 listings starting at $1,999
Used Chevrolet Silverado 2500
9 Great Deals out of 231 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.