Truck runs good while idle

Tiny
NICH
  • MEMBER
  • 1993 CHEVROLET CHEYENNE
  • 360,000 MILES
And when get going it starts stalling and the breather top pops up like it is keeping from back firing

changed the spark pklug wires in April of 2013, but noticed the truck would slow down on the freeway when get to about 50mph, changed the wire that was damaged to the spark plug, but not all the wires then it was ok for a day then the same problem.

So I changed the fuel filter thnking it was the problem truck ran fine till later that night on the freeway. Now changed the wire on the distributor to the core and everthying was good had power, did good on the freeway 70mph not issues, until later that night the same problem came back
Tuesday, November 12th, 2013 AT 10:36 AM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
What "breather" is popping off? Also, have you checked the fuel pump pressure to see if it is within the manufacturer's specs?
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Tuesday, November 12th, 2013 AT 10:54 AM
Tiny
NICH
  • MEMBER
  • 2 POSTS
I just changed all spark plug wires, took down the street, and I think that done the trick. Thank you for your time !
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Tuesday, November 12th, 2013 AT 11:30 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Let me know if you have other questions.
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Tuesday, November 12th, 2013 AT 4:22 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
YOU MIGHT EVEN USE SHORT SECTIONS OF SPLIT OPEN FUEL/ VACUUM LINE OVER THE PLUG WIRES WHERE THEY RUB/ OR MIGHT RUB ON STUFF

A LITTLE PREVENTION MIGHT MAKE YOUR WIRES LAST A LONG TIME

THE MEDIC
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Tuesday, November 12th, 2013 AT 5:17 PM

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