Question about 1985 GMC K1500

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WHERE IS THE FUEL FILTER FOR A 91 GMC ROCHESTER THROTTLE BODY

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The filter for a truck TBI would be under the floor between the gas tank and the engine. Its attached to the frame.

Posted on Jan 05, 2013

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6ya6ya
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Posted on Jan 02, 2017

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  • 182 Answers

SOURCE: 1996 GMC Sierra 1500 truck fuel problem

Have you check the injector relay or maybe a fuse for injectors.

Posted on Aug 27, 2008

  • 2 Answers

SOURCE: 2000 gmc rough idle

Im not sure if this can help, but my 2000 gmc sierra was idling badly. Replaced Fuel Pressure Regulator and my truck runs like its brand new. My service engine light was also on.

Posted on Jan 10, 2009

MNfisherman
  • 11896 Answers

SOURCE: my son's gmc 4.3l hesitates upon acceleration. I

do you have any check engine lights on? If you do, that is the first thing I would have checked. It does sound like plugged EGR, vacuum leak, or bad TPS

Posted on May 15, 2009

  • 850 Answers

SOURCE: 92 gmc pickup,fuel injected throttle body.Engine

electronic dizzy modules do this when they get warm they cut out but can start up again within minutes !
very commen fault!
get it checked or borrow one
Cheers Rob

Posted on Aug 15, 2009

wireguy212
  • 1627 Answers

SOURCE: I have a 93 GMC sierra that has a lot of trouble

Turn the key on and go have a coffee.If the fuel pump is running it does not mean that is pumping enough fuel to start,the motor may be good but the pump wore out.Try a shot of fuel in the throttle body to see if it starts quicker,if so then you either need a pump or a filter.[you already tried a filter so i'm leading to pump or restricted fuel lines].

Posted on Nov 05, 2009

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I have a 91 GMC suburban that has been sitting for a year I changed the oil and the fuel filter and repaired fuel line among lots of other things the truck started up then shuts off an smokes black


How long since over-all tune-up? Any applicable trouble codes? You may need fresh fuel? If your check engine lite still works, you should be able to check some codes, yourself? I don't know liter size of engine?
Is the vehicle flooding? Use a gage and check proper fuel pressure. Do you have tbi fuel injection, fuel injector/s in the throttle body. If so, the fuel pressure is 9--13 psi. Also, the coolant temp sensor could cause it to flood. Could be other issues?

May 22, 2017 | GMC Cars & Trucks

1 Answer

97 gmc siera on cold days have to dump fuel into throttle body to start, runs fine after??


look into throttle body while cranking.see if you see fuel spray.if not, low fuel pressure of pluged fuel filter. also coolant temp or tps sensor could be at fault.have vehicle sensors scan tested for values..

Dec 25, 2012 | 1997 GMC Sierra

1 Answer

91 3/4 ton 4x4,454.idle falls off&dies when stopping or when shifted from fwd to rev. no codes tried iac motor but no change.


You may have a body throttle position senson. You need a scanner to confirm that. You may have a vacuum leak somewhere around the throttle body. You may have a fuel pump getting weak so I would check fuel pressure. You may have an EGR valve that is partially stuck open.

Apr 26, 2011 | 1991 GMC Sierra

2 Answers

My truck is back firing through the carb and i have a 40 psi with a 2 barrel rochester throttle body carb


You don't mention any other recent work, but backfiring is frequently a timing issue. It would be a good idea to get a timing check done.

Apr 11, 2010 | GMC K3500 Cars & Trucks

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.

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