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MARK_VANDERBENT's avatar
Nov 16, 2015

Question for all 6.5 diesel Gurus

My 95 turbo burb runs awesome ! smooth and powerful. But she starts a little sloppy, I have new glow plugs and voltage is great. Also have a new starter , and lift pump. Its starts every time , but it does not pop off smooth. Any insights would be great!! My fuel filter is new , and I run additive every fill up. Just seeing if anyone has any ideas. Thanks, truck has 250,000 miles.
  • It's winter time... Did it act the same last year during colder weather?
    The lack of smoothness is most likely 1 or more cylinders not firing on the first few rotations while the other 7/6/5 are.

    You can use a multimeter to check the resistance of each glow plug (remove the splash guard on the passenger side, I think you need to remove the driver's side as well, can't remember). Disconnect the wiring to the glow plug then test. Look for one that has a high/open compared to the others.

    You can also cycle the key more than once to time the plugs a second time for additional heat. Had a PSD that about half the plugs were shot (gotta pull valve covers and it's a bigger job than on the 6.5L or the LBZ). It was a rockin, shakin, smoke puffing ride for the first few seconds.