Question about 1994 GMC Sierra

1 Answer

My truck will only start if I hold the gas to the floor, like its flooded, and it chugs, and blows black smoke out exhaust

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 59 Answers

First ,l want to know whether is caburettor type or injection,if carb check your carb float, injection you should get a car scanner read for fault code maybe air mass sensor, coolant temperature sensor or 02 sensor

Posted on Apr 05, 2011


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Nissan starting problems

You have a vacuum leak therefore your car is running rich

Jul 21, 2014 | 1993 Nissan Sentra 4 Door

2 Answers

1998 gmc sierra 1500 5.0L

white smoke is a blown head gasket [white smoke burning anitfreeze]

Jun 24, 2013 | Cars & Trucks

1 Answer

91 944 3.0 acts like it flooded when starting then clears up and runs fine

Hello there
Check your cold start valve(injector) it is probably leaking

Feb 17, 2013 | 1991 Porsche 944

1 Answer

I have an 20005 acura mdx and it wouldn't start for several attempts. after about 5 mins it started rt up and has not done that again. The horn would blow and there were no indicator lights on. Could...

Sounds like it was flooded. Next time it happens. keep gas pedal all the way to the floor and hold until it fires. water in the gas, or just bad gas can do this. But if you pumped it at all while trying to start it if fuel injected can flood it. Let it sit and try again, or keep gas pedal to ground and hold until starts.

May 02, 2011 | Acura MDX Cars & Trucks

1 Answer

My truck will only start by holding gas pedal to the floor, like its flooded, and only chugs, blows black smoke out of exhaust

I am having the same problem. I would really appreciate it if you have found a solution to this problem to em me. I have checked the fuel pressure, map sensor, TPS sensor and even tried a new ECM. None of them was the problem. Every once and a while I will get it to start and then after about a minute the idle will speed up and I can tell that it is getting too much gas. Then the times that it won't start I try holding down the gas so that it shuts off the fuel supply and once it begins to fire the injectors begin to just dump way to much gas into the throttle body. Let me know if you have found a solution. It info would be very much appreciated.

Apr 05, 2011 | 1994 GMC Sierra

1 Answer

Have to hold gas pedal to floor to keep car running.wont go over 45 with it floored.and there is blue smoke from exhaust

i would suggest checking into the throttle positions sensor. the smoke makes it sound like the car is flooding.

Apr 18, 2010 | 1999 Nissan Maxima

2 Answers

Will not start and run. blows black smoke while

The pressure regulator is most likely the problem,but have the codes read to make sure.

Feb 26, 2010 | 1993 Buick Park Avenue

2 Answers

Black smoke coming from a 250 GM inline 6 exhaust pipe, then ran rough and now has quit and will not start

you don't say what year, if it has a carburetor it's flooding (Needs a new float) Way too rich

remember this
Blue smoke OIL
black smoke GAS

Aug 30, 2009 | 1983 GMC Jimmy

Not finding what you are looking for?
1994 GMC Sierra Logo

138 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

80407 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides