Hi, all.
I'm the latest owner of a 1995 Suburban 1500 with the 6.5 turbo diesel in it.
I've driven it for the past three months without trouble. Last week it started
stalling intermittently and now it will only run for 20 seconds or so before stalling.

Saturday, I did the fuel pump test and it failed (no fuel from "bleeder" hose on engine).
I replaced the fuel pump and the test failed again. (Why don't I read directions? :-) ). I replaced the OPS and fired the truck up. It seemed fine
on a quick run around the block and the fuel pump test now passes.

Sunday, I took the truck for a drive. It ran OK but when I went to restart the truck a few hours later, it kept stalling. When I do the fuel pump test now, it still passes.

My question now is, "Where do I go from here? Is it likely that running without the fuel pump (not sure how long) stressed the IP enough to break it? Or is this a case of the PMD going bad in conjunction with the fuel pump not working?

Diagnostic check list below.

Thanks a lot,
Tom
Eliot, ME

1. Does the engine Turn over? -- Yes.
1a. Does the engine start? -- Yes, but sometimes only after several tries.
1b. Do you have a Wait To Start Light & duration lit. -- Yes.
1c. Ambient Condition (temperature outside) -- 75
1d. Engine Cranking speed (if you have an accurate tachometer). -- Not sure, but seems normal.
1e. Are you experiencing stalling? -- Yes
1f. If Stalling, describe (upon startup only, down the road, hit a bump etc) -- Stalling occurs at startup and when going down the road. Does not seem sensitive to bumps.
1g. If Stalling, do you notice loss of dash or instruments? -- Dash and instruments are on.
-note if experiencing stalling,you must indicate PMD location in #24.1.1Lift pump test (http://dieselplace.com/forum/showthread.php?t=39350)- describe results -- Initially failed. Pump and OPS replaced. Test now passes.

2.Service Engine Light - on/off/intermittent -- I did see this light on once during limping the truck home.
3.Model year -- 1995
3a. Odometer reading -- 150,000
3b. Miles on major engine components if been replaced (example Injection pump) -- Do not know.
3c. Indicate the model number on the Injection pump (starts DS4 or DB2......) -- Do not know.
4. Have you scanned for engine codes? (varies by pre/post 96) yes/no -- No.
5. List exact results on engine codes:
6.Air Filter condition (visual check) -- Haven't checked.
7.Fuel filter condition (freshly changed or condition unknown) -- Condition unknown.
8.Condition of Battery terminal connections (removed, cleaned and tightened) -- Did not do this yet.
8A.Known condition and age of the batteries. -- 3 months old
8B.Are batteries of differing age or are they a matched set? -- matched
8C.Condition of Major Grounds (http://www.dieselplace.com/forum/showthread.php?t=157085). (same drill as batt - removed, cleaned, retightened) -- Not checked.
9.Upon cold start, does the radiator hose get hard quickly? Yes/no -- Don't know.
10.Upon cold start, do you have excessive white smoke? Yes/no -- no
11.Do you have excessive cranking time before the engine starts? -- Sometimes.
12.Have you used the block heater, and does this effect engine starting?(only try for starting problems) -- No
13.During hard acceleration, do you have excessive black smoke? Yes/no -- No
14.Do you have any unusual exhaust smoke issues? -- No
15.Turbo check out (http://dieselplace.com/forum/showthread.php?t=39368)- pass/fail -- Did not test.
16.Do you have an EGR on the engine? (An F or an S engine code) -- F engine
17.Indicate if you know if it’s a 1500, 2500, 2500HD, 3500, 3500HD. -- 1500
18.Indicate fuel that you are using: Bio-diesel, #2 Diesel, #1Diesel, SVO/WVO, other -- #2 diesel
18a. If running a VO setup, indicate details of your conversion (homemade, or packaged system)
19.Are you using any fuel additives? If so, please list. -- No
20.Please indicate geographic region you are in: (example: Texas or Canada) -- Maine
21.Do you have any service history available that might pertain to the problem you are having? -- No
22.Please indicate any modifications to the vehicle that might help us diagnose better.
23.Upon unscrewing the fuel cap (http://dieselplace.com/forum/showthread.php?t=42338), do you have a large vacuum formed in the tank? yes/no -- Not tested.
24.Location of PMD/FSD (http://www.dieselplace.com/forum/showthread.php?t=39436)? On the pump/remoted over intake/remoted out of engine bay (please specify specifically) -- On the pump
25.Are ALL glow plugs in proper working order as per this thread (http://www.dieselplace.com/forum/showthread.php?t=39182)? -- Not tested.

Hi Tom....welcome to the 'place

Have you changed your fuel filter lately?

Do you have a spare PMD to swap in place?

If the truck stalls and the LP still passes its test then fuel supply to the IP is suspect or the PMD could be failing....if the truck was run for too long without a functional LP (and the PMD was installed on the IP) then temps on the IP/PMD could have gotten too hot and killed the PMD...

If you are buying a new PMD you really need to check out heath diesel....his remote kits are expensive but the warranty and piece of mind are more than worth it...

Thanks, Chris.

Before all this happened, I was considering the Heath PMD relocator. I guess
it will be now rather than "someday."

-- Tom