Question about 1994 Chevrolet C1500

2 Answers

I have 1990 chevy pickup 1500 4 wheel 350 eng. throttle body inj. the truck started missing and stalling i changed fuel filter and it ran good for 2 days then started the same thing so i changed fuel pump it ran good for about 2 miles then it sat for about 2 hours when i started it started doing the same i barely made it back home. when i took off gas cap it had worst vapor lock i've ever seen (it did the same before i changed the pump) also there was gas gushing out of charcoal cannister any help please. frank.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 17 Answers

It sounds like the engine is pulling fuel from the tank, and not replacing it with air, causing a vacuum to build in the tank. The vacuum, may build to the point that it resists the fuel pump's efforts to **** fuel from it. If the vacuum is sufficient, it may collapse the tank, or expand the fuel enough for the engine manifold vacuum to **** raw gas into the evaporative emissions control system, hence the cannister.

Replacing the fuel pump, and filter will both break this vacuum, and make it run well for a few more miles, until the vacuum builds again.

The tank is usually vented to relieve pressure and vacuum through the gas cap.

Basically, sounds like a bad gas cap.

Try driving with the cap loose or removed. If that fixes it, buy a new cap. Preferably a locking one, as the amount of fuel these trucks hold is pretty tempting to less than honest folks. My 1990 C2500 has a 34 gallon tank.

Coil?? with the other symptoms, how'd you come up with that?

Posted on Apr 08, 2009

  • cwrrailfan Apr 08, 2009

    Wow, the language filter edits out the word ****? replace the astericks with "pull"

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Sounds like you need a new coil get it checked its free. they sometimes stop workin when they get hot just before they die
Jay

Posted on Mar 08, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

WHERE IS THE FUEL PRESSURE REGULATOR ON 1994 CHEVY PICKUP


SKM, fuel pressure regulator is on top of throttle body. This could be the problem, could also be vacuum leak, faulty EGR, etc. You may want a good Tech, to diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
TBI 220 Fuel pressure regulator change 1
92 chevy truck missing at constant speeds The 1947 Present Chevrolet GMC...
Where is the fuel pressure regulator on 1994 Chevy truck 5 7 TBI fuel...
started stalling and dying when in gear

Jul 28, 2016 | Cars & Trucks

1 Answer

Change tranny fluid 1993 Chevy pickup drive only gear now


You may need a trans shop to take a look. Often times changing the fluid and filter on a vehicle thats over 15 yrs old causes more problems than it solves. Draining the fluid and changing the filter removes particles that were keeping the clutches and bands working. Something could have clogged up one of the ports on the valve body too.

Jun 12, 2013 | Cars & Trucks

1 Answer

1990 1/2 ton chevy truck 6 cyl...sputters when first starting out, runs fine on open highway, stalls alot..


change air & fuel filters, EGR valve, & PCV valves need replaced ! a tune-up may help your engine also, spark plugs, plug wires, etc., etc., check all vacumn lines, tighten all throttle body bolts, on so on, good luck

Jan 28, 2013 | Chevrolet Cars & Trucks

2 Answers

1989 truck stalls when hot.


Have you chg. fuel filter? If so, best to do a fuel pressure test, sometimes( not always) when the pump gets warmed up they can loose a little pressure and thats all it takes just a few # under recamended p.s.i and the truck quits running, you may hear the pump run but its not putting out the correct pressure until it cools down and it starts working again, but after a while quit all together.

May 27, 2009 | 1989 GMC K1500

2 Answers

1990 chevy camaro with a rebuilt 350 Tbi


fuel pressure isnt right.. need to get a fuel pressure regulator so you can regulate the gas flow..

Apr 21, 2009 | 1990 Chevrolet Camaro

1 Answer

I changed my intake gasket, and now wont start!


re-torque the intake manifold bolts in the proper pattern. also check that the hose from the filter to the throttle body is hooked up correctly with no air leaks

Mar 07, 2009 | 1997 Chevrolet Tahoe

2 Answers

92 Chevy Silverado 1500 (350) throttle body question.


That Absolutely could be the Problem. Have you Replaced the Fuel Filter Yet?

Jan 04, 2009 | 1992 Chevrolet K1500

1 Answer

Chevy s-10 pickup truck water in gas 6 cyclinder


check basics ...air /fuel /spark...try spraying carb cleaner into throat of throttle body to see if it starts and runs on that ...advise us/me

Nov 10, 2008 | 1997 Chevrolet S-10 Pickup

1 Answer

My 91 suburban does not start or stay running , intermittantly . The fuel pump and filter was changed but the problem remains . also if I do get it started it runs fine for a while then starts bucking and...


I have a 91 suburban and it wont hold idle. I am waiting for and egr valve. if that fixes it i will let you know. I was told that they can have an internal vacuum leak therefore being difficult to detect.

Aug 04, 2008 | 1995 GMC Suburban

Not finding what you are looking for?
1994 Chevrolet C1500 Logo

685 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

64286 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...