454

Asked by Aug 26, 2013 at 10:03 PM about the 1990 Chevrolet Suburban R2500

Question type: Maintenance & Repair

idles good tap the gas and it cuts out.  have not driven it for 6 months

7 Answers

90,635

Have you replaced the fuel filter? Have you checked the fuel pressure and flow? Is there a check engine light on?

no no and yes check engine light is on

carburetor is making a buzzing sound too

90,635

It should TB injection, replace the fuel filter and test the pressure and flow and get the codes, this has OBD 1 so go to: http://www.youtube.com/watch?v=UIKdbTFvyUU

9,855

Check what tennisshoes has specified. Is it electrical or mechanical buzzing. The fuel pressure regulator is built into the TBI, it would make a mechanical sound if plugged. Most of the time you can remove the TBI and clean it out. If the gaskets don't tear and look good I have re-used them (just monitor for leaks once you get it running again). 1990 shouldn't have the quick dis-connect fuel lines if your lines are rusty spray them with a penatrant and use line wrenches so that you don't round them off. Electrical buzzing? I doubt it would be the injectors, when they go they either stop spraying or spray continuosly. The Idle Air Control Valve is on the TBI but I doubt it would cause this, usually will not idle or will surge if this is damaged. I'm leaning towards the regulator. Clean it then change the fuel filter (on the driverside framerail under the cab, use line wrenches and lube on these fittings also, don't want to twist the end of a line off).

20

I have a 1978 that does the same thing. Going to replace the fuel filter and go from there. Someone also suggested to me that the fuel pump might be going bad as I can't enough power at high speeds.

9,855

@ SanDane Yes the mechanical fuel pump is a good place to start. The rubber supply line from the steel line on the frame to the suction side of the pump should also be checked. The older lines can swell on the inside and choke off fuel flow.

Your Answer

Add photo

Related Questions

Suburban

Looking for a Used Suburban in your area?

CarGurus has 18,832 nationwide Suburban listings starting at $2,295.

ZIP:

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 950
#2 Eric Fritz
Eric Fritz
Reputation 860
#3 Neal Turner
Neal Turner
Reputation 830
View All

Related Models For Sale

Used Ford F-150
2,228 Great Deals out of 208,346 listings starting at $1,499
Used GMC Suburban
138 listings starting at $1,450
Used Ford Explorer
807 Great Deals out of 74,544 listings starting at $750

Used Cars For Sale

2017 Chevrolet Suburban For Sale
9 Great Deals out of 7,825 listings starting at $39,493
2016 Chevrolet Suburban For Sale
37 Great Deals out of 2,221 listings starting at $36,990
2015 Chevrolet Suburban For Sale
26 Great Deals out of 1,233 listings starting at $24,995
2014 Chevrolet Suburban For Sale
20 Great Deals out of 552 listings starting at $17,795
2013 Chevrolet Suburban For Sale
32 Great Deals out of 755 listings starting at $10,995