1994 GMC 1500

  • Tiny
  • jhknight404
  • 1994 GMC Truck
  • 4 CYL
  • 2WD
  • automatic
  • 260,000 miles

I have a 1994 gmc 1500 with a 4.3L V6 it started running crappy the other day and in messing with it I have found that it only runs fine in reverse, in P, N, or and forward gears it spits and sputters and backfires and dies. Any suggestions?

Do you
have the same problem?
Yes
No
Thursday, August 11th, 2011 AT 8:59 PM

11 Replies

  • Tiny
  • rasmataz
  • Member

Go to this links: http://www.2carpros.com/articles/engine-backfires-while-running and http://www.2carpros.com/topics/engine-performance/backfires

Was this
answer
helpful?
Yes
No
Thursday, August 11th, 2011 AT 9:31 PM
  • Tiny
  • jhknight404
  • Member

I understand all this but why would it run fine in reverse but not in any other gear?

Was this
answer
helpful?
Yes
No
Thursday, August 11th, 2011 AT 9:37 PM
  • Tiny
  • rasmataz
  • Member

Could be a problem with the transmission

Was this
answer
helpful?
Yes
No
Thursday, August 11th, 2011 AT 9:57 PM
  • Tiny
  • jhknight404
  • Member

I don't think its the tranny its the engine lurching and spitting except when in reverse

Was this
answer
helpful?
Yes
No
Friday, August 12th, 2011 AT 12:37 AM
  • Tiny
  • jhknight404
  • Member

Is there some sort of sensor that might cause this issue?

Was this
answer
helpful?
Yes
No
Friday, August 12th, 2011 AT 8:33 PM
  • Tiny
  • jhknight404
  • Member

Am I going to get any help here or what?

Was this
answer
helpful?
Yes
No
Saturday, August 13th, 2011 AT 5:09 PM
  • Tiny
  • rasmataz
  • Member

Try disconnecting the TCC solenoid and see what happens

Was this
answer
helpful?
Yes
No
Saturday, August 13th, 2011 AT 6:23 PM
  • Tiny
  • jhknight404
  • Member

Where is that located?

Was this
answer
helpful?
Yes
No
Saturday, August 13th, 2011 AT 10:21 PM
  • Tiny
  • jhknight404
  • Member

Doesn't make a difference. Someone said to try the park neutral switch. Could that make the motor run differently in different gears?

Was this
answer
helpful?
Yes
No
Sunday, August 14th, 2011 AT 1:01 AM
  • Tiny
  • jhknight404
  • Member

Where are all the gound straps on this model?

Was this
answer
helpful?
Yes
No
Tuesday, August 16th, 2011 AT 2:24 PM

Please login or register to post a reply.

Similar Questions