check engine flashing

[96liftedchevy]

i have a 96 chevy ext cab with a 5.7 today i was getting on the highway and when i would accelerate it would feel like a tire was out of balance and the check engine light would flash when i would let off the gas the check engine light would stop flashing and the vibration would stop also. it would only do it as i was accelerate. trying to maintain my speed up a hill. it wouldn't do it if i let the truck drop in speed for the hill not trying to press hard an the gas does anyone know what this might be thank you.

 

[jdyates]

Sounds like the knock sensor is going crazy. Check your timing.

 

[phule]

I would start by scanning check engine light. Excess fuel is being dumped to prevent detonation. Flashing light indicates possibility for catalyst damage. Scan light and post back with code

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[bluex]

A flashing ses is from a P0300 random/ multiple misfire. That's why it felt that way an also why it stopped when you let off the gas.

when was the last time the truck got a tune up an a fuel filter....

 

[96liftedchevy]

Thanks for the help when I get it scanned I'll post it

 

[96liftedchevy]

I bought it 2 years ago and tuned it up and new distributor and replaced the fuel filter

 

[bluex]

How many miles since then? The fuel filters need to be changed much more often than that on these trucks...

 

[96liftedchevy]

i dont drive it much iv only put 10,000 on it in 2 years

 

[Tricky's_Limitedhoe]

Sounds like bad injectors. Had that same problem some years back. Truck would not do over 30 mph before check engine light would flash rapidly.


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[1997chevydriver]

Crank sensor will cause that too

Sent from somewhere in MN