Bryce
New Member
93 6.5TD 4L80E 260,000 miles, stock.
The "cel" keeps coming on and going off. Using the paper clip method to pull codes the only one present is 12. I have had it to the GM dealer and 2 diesel shops and 1 trans shop.
None of the 4 have been able to pull any codes with their scanners.
This light is very erractic, no pattern to it. No change in performance when light comes on.
In suggestions from the shops I have had it to, and online research through several diesel sites, I have done quit abit of work to this truck but nothing has helped.
So far I have checked, cleaned or changed all grounds, had the IP rebuilt, replaced TPS, ECM, EPROM (what I know it as, the chip in the ECM), VSS and fuel cap.
As I drive it the problem seems to be tied to the throttle. The light will come on when I let off and as I step down again the light goes off. But with scanners hooked up and driving it everything shows in spec.
With no stored codes this has become :mad2:
Any and all suggestions or tips will be greatly appriciated. I have not been able to register this truck for 2 yrs because it fails the county emisions test because the light comes on while they run the test, but still no codes present.
The "cel" keeps coming on and going off. Using the paper clip method to pull codes the only one present is 12. I have had it to the GM dealer and 2 diesel shops and 1 trans shop.
None of the 4 have been able to pull any codes with their scanners.
This light is very erractic, no pattern to it. No change in performance when light comes on.
In suggestions from the shops I have had it to, and online research through several diesel sites, I have done quit abit of work to this truck but nothing has helped.
So far I have checked, cleaned or changed all grounds, had the IP rebuilt, replaced TPS, ECM, EPROM (what I know it as, the chip in the ECM), VSS and fuel cap.
As I drive it the problem seems to be tied to the throttle. The light will come on when I let off and as I step down again the light goes off. But with scanners hooked up and driving it everything shows in spec.
With no stored codes this has become :mad2:
Any and all suggestions or tips will be greatly appriciated. I have not been able to register this truck for 2 yrs because it fails the county emisions test because the light comes on while they run the test, but still no codes present.