I have a 1998 chevy 6.5 diesel truck. Never had a problem. Was going out of town one day. Loss of power going up hills. I turned around and came into town. Now when i go places, the truck starts up just fine everytime. IT's when I give it gas that it hiccups and stutters. It does this a lot more when the truck bearly starts. Once it's warm I have to give it gas slowly to reach desirable speeds on the highway. can anyone help?
6.5l hicupping problem...
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oil pressure switch will give power to the lift pump, assume you get into a nasty accident where the engine shuts down all on it's own. without that switch fuel will continue to flow cause your key is still on. when the engine shuts down it loses oil pressure in effect shutting off power to the lift pump. did you try opening the t valve to see if the lift pump is operating, when was the last time the fuel filter got changed.IvanC;1560697; said:
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Hiccuping is a fairly common problem and most times is the PMD/FSD. As they are susceptable to heat damage and the OEM is in a hot location the common solution is to relocate it out of the engine compartment. Are you throwing any codes? You should fill out your signature so we have more info to help you with. I have the hiccuping and find that if it's really cold (10F, -15C) it's less of an issue. I also have a new OPS and that didn't change it.
I did the check list....any ideas?
1.Lift pump test - opened t-valve...fuel came out
2.Service Engine Light - on only before start up
3.Model year - 1998
3a. Odometer reading - 170,000
3b. Miles on major engine components if been replaced - n/a
4.Do you have any engine codes? No
5.If you do have engine codes -
6.Air Filter condition - have a k&n filter...appears that its good.
7.Fuel filter condition - less than 2000 miles
8.Condition of Battery terminal connections - clean and good
8A.Known condition and age of the batteries. - less than a year
8B.Are batteries of differing age or are they a matched set? - matching
9.Upon cold start, does the radiator hose get hard quickly? n/a
10.Upon cold start, do you have excessive white smoke? no
11.Do you have excessive cranking time before the engine starts? no
12.Have you used the block heater, and does this effect engine starting? yes i use it, no it does not affect it
13.During hard acceleration, do you have excessive black smoke? when hiccuping at times gives out black smoke
14.Do you have any unusual exhaust smoke issues? see above
15.Turbo check out - n/a
16.Do you have an EGR on the engine? n/a
17.Indicate if you know if it’s a - its a 1500
18.Indicate fuel that you are using: #2, and #1, also dyed diesel
19.Are you using any fuel additives? no
20.Please indicate geographic region you are in: texas
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. PMD has been changed
23.Upon unscrewing the fuel cap, do you have a large vacuum formed in the tank? little bit of noise
24.Location of PMD/FSD? On the pump/remoted over intake/remoted out of engine bay (please specify specifically). The PMD is located next to the bumper mounted below the radiator/engine.
25.Are ALL glow plugs in proper working order as per this thread? yes
1.Lift pump test - opened t-valve...fuel came out
2.Service Engine Light - on only before start up
3.Model year - 1998
3a. Odometer reading - 170,000
3b. Miles on major engine components if been replaced - n/a
4.Do you have any engine codes? No
5.If you do have engine codes -
6.Air Filter condition - have a k&n filter...appears that its good.
7.Fuel filter condition - less than 2000 miles
8.Condition of Battery terminal connections - clean and good
8A.Known condition and age of the batteries. - less than a year
8B.Are batteries of differing age or are they a matched set? - matching
9.Upon cold start, does the radiator hose get hard quickly? n/a
10.Upon cold start, do you have excessive white smoke? no
11.Do you have excessive cranking time before the engine starts? no
12.Have you used the block heater, and does this effect engine starting? yes i use it, no it does not affect it
13.During hard acceleration, do you have excessive black smoke? when hiccuping at times gives out black smoke
14.Do you have any unusual exhaust smoke issues? see above
15.Turbo check out - n/a
16.Do you have an EGR on the engine? n/a
17.Indicate if you know if it’s a - its a 1500
18.Indicate fuel that you are using: #2, and #1, also dyed diesel
19.Are you using any fuel additives? no
20.Please indicate geographic region you are in: texas
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. PMD has been changed
23.Upon unscrewing the fuel cap, do you have a large vacuum formed in the tank? little bit of noise
24.Location of PMD/FSD? On the pump/remoted over intake/remoted out of engine bay (please specify specifically). The PMD is located next to the bumper mounted below the radiator/engine.
25.Are ALL glow plugs in proper working order as per this thread? yes
it's to dark to check now...but it might be loose that is a possiblity
let me shed new light on my problems. I went out into town to "test" the problem. You could say i put the pedal to the metal....sputtered a little for 4 seconds or so...then it picked up and accelerated. After that everytime i gave it gas, it never hicupped sputtered or anything. When i turn it on tomorrow, most likely it will be back to the same thing. Hicupping and sputtering. Help!
let me shed new light on my problems. I went out into town to "test" the problem. You could say i put the pedal to the metal....sputtered a little for 4 seconds or so...then it picked up and accelerated. After that everytime i gave it gas, it never hicupped sputtered or anything. When i turn it on tomorrow, most likely it will be back to the same thing. Hicupping and sputtering. Help!
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