'94 Chevy Blazer 6.5L turbo Diesel surge/lope after new IP install

Starts up at normal rpm, but tap the throttle and it starts to surge/lope from 800 to 1,000 rpm, when I put it in gear, tap the brakes or turn the steering wheel it drops down to normal rpm, put it in neutral and it stays normal until I tap the throttle then it starts the surging again, also when driving if I let off the throttle the rpm drops down to normal, then goes up to 1,000 rpm for a second before dropping down again.

Category:

Autos & Vehicles

Tags:

• Diesel
• 6.5L
• turbo
• 1994
• Chevy
• Blazer

[frantchescon]

my truck did the same thing, and i replace the PMD with heat sink and problem go away

[mbarje]

@frantchescon Thanks, but the PMD is new, on a heatsink in the grille, I swapped my spare with no change, dealer tried their PMD and no change,

[chathorn1]

My truck is doing the same thing...Did you ever find the problem?

[mbarje]

@chathorn1 No, it's still doing it, can't find a mechanic that knows this engine, I posted my problem on the Diesel Place forum but nobody could figure it out.

[pronghorntractorwork]

You might try the throttle potentiometer

[fmfpowercore2]

trotle position sensor

[chathorn1]

If you figure it out will you let me know...same for me if I figure something I will let you know. THanks