1992 Truck Sputter (1 Viewer)

[meatloaf]

Picked up my son's 1992 (22re 5sp) truck from a mechanic in Houston TX to drive it back to Austin... Mechanic replaced bad VSV's & BVSV's and vacuum lines. Truck was running good for about 100 miles, filled up the gas tank in a small town along the way & around 20 miles later I noticed that when turning blinkers on the truck would cut out or miss and the tachometer needle would rapidly drop to to zero and back. Same thing happens if I would turn on the headlamps or flash the high beams. I also noticed with the blinkers/flashers the truck would "miss" every time the light flashed. I thought a wire may be shorting out, but when going down a steep hill I decelerated a little and it started missing a lot. The whole truck would shake, clear up momentarily and then start shaking again for the next 45 miles or so. Could be electrical, bad gas?

 

[KLF]

Check grounds.

Then start tearing into the engine harness to fix the injector splices.

 

[meatloaf]

Check grounds.

Then start tearing into the engine harness to fix the injector splices.

Thanks KLF, I will check grounds. Not sure I understand your comment on fixing the injector splices? Do the injector splices break or wear where they junction with/at the harness? Please expand.

Thanks,
ML

 

[Mudder]

The grounds for the injectors are just crimped together. As it gets older they tend to break and fail.

 

[meatloaf]

Thank you KLF & Mudder!!!

problem seems to be fixed. replaced bad head to firewall ground and the p/s bracket to body ground was missing. ran truck about 10 miles or so with no issues...

 

[Mudder]

As I was once told, 99% of electrical problems are grounds. I don't know how many times I've fought problems only to realise I just needed to fix the ground.

 

[meatloaf]

For the FI grounds, is there an easy access point for these on the harness?