Mechanics

ENGINE MISFIRE CRUISING ON THE HIGHWAY

2000 Chevrolet Silverado • 19,300 miles

Why does my engine misfire when I'm cruising on the highway. This usually occurs when I'm climbing a gradual hill. If I give it gas the vehicle jumps

i have replaced all sensors! Fuel pressure is 50 psi where it is suppose to be lost!
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Michaelcox1
October 5, 2012.




5.3


Tiny
Michaelcox1
Oct 5, 2012.
Here's the crazy part I dont see a baro sensor listed for it.I dont see any trouble codes listed for it ethier.I looked up component locations didnt list on for it. What is the map reading at idle?


Saturntech9
Oct 6, 2012.
I don't either. Some one said it was run by the map sensor. But I put in a new map. And did not change anything.


Tiny
Michaelcox1
Oct 6, 2012.
What does the map. Sensor read at idle?


Saturntech9
Oct 6, 2012.
I will have to check again lol


Tiny
Michaelcox1
Oct 6, 2012.
Let me know


Saturntech9
Oct 6, 2012.
1.25 v


Tiny
Michaelcox1
Oct 6, 2012.
1.25
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Tiny
Michaelcox1
Oct 6, 2012.
Thats about what it should be. How are the spark plug wires?


Saturntech9
Oct 7, 2012.

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