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Related Medium and Heavy Trucks Questions
I have a 2001 Isuzu NPR with 4HE1 engine. I removed the
Hello, I have a 2001 Isuzu NPR with 4HE1 engine. I removed the injection pump to replace the oil cooler. After reassembling I have a no start condition. I am right on the timing marks for 8 & 13 deg. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
I have a 04 isuzu npr hd 4.8 diesel 4he1. i replaced the oil
i have a 04 isuzu npr hd 4.8 diesel 4he1. i replaced the oil cooler due to a leak. removed the injector pump double checked timing marks and it looks correct. now i have cranking but a no start. bled … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,806 satisfied customers
2001 Isuzu NPR diesel, runs for 40 seconds and shuts off.
2001 Isuzu NPR diesel, runs for 40 seconds and shuts off. turn key off then starts right up for 40 seconds and dies like you turned off the key. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
It turns over and runs for maybe 30 seconds then dies. My
Hi. It turns over and runs for maybe 30 seconds then dies … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
I have a 1999 iszuzu npr 4he1 diesel and my engine stop
I have a 1999 iszuzu npr 4he1 diesel and my engine stop cable is not working. I got one from Busbee's truck parts and it still isn't working. Leads me to believe it is electrical … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,806 satisfied customers
Isuzu npr 4he1 diesel will not crank due to engine stop not
Isuzu npr 4he1 diesel will not crank due to engine stop not working. Replaced it and still not working.… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
06 Isuzu NPR 5.2 diesel went into limp mode. got it back to
06 Isuzu NPR 5.2 diesel went into limp mode. got it back to the shop, changed the fuel water separator, doped the tank, cleaned it out. Put the "What I thought was the fuel pump back" there was some j… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
I have a 1999 isuzu npr diesel that started getting weak
i have a 1999 isuzu npr diesel that started getting weak about 3 weeks ago. it will not run over 55 on flat ground. we replaced the fuel filer last week and no change. today it shut off at a stop sign… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
99 Isuzu NPR with 4he1 diesel. Starts, runs for 2 seconds
99 Isuzu NPR with 4he1 diesel. Starts, runs for 2 seconds and shuts down. Fuel supply is ok. filters new. Lift pump is good. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
2006 Isuzu NPR HD diesel. Intermittently goes into lip mode
2006 Isuzu NPR HD diesel. Intermittently goes into lip mode with code P0091. The Fuel rail pressure sensor, injectors, fuel pressure regulator and pigtail have been replaced. The pigtail for the Fuel … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
2007 isuzu npr diesel has diesel fuel flowing into engine
2007 isuzu npr diesel has diesel fuel flowing into engine oil. Comes spraying out of oil overflow hose obto ground. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
484 satisfied customers
No fuel at injectors, 05 isuzu NPr 4HE1-XS, Yes. Opened top
Yes. Opened nut top of fuel filter, diesel present. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
the truck (2000 isuzu NPR Diesel) started just fine, 300 yards,
the truck (2000 isuzu NPR Diesel) started just fine, 300 yards, the fuel gage dropped to empty and the tuuck started studdering like it was out of fuel, then died. all other gages work, the engin trys… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,747 satisfied customers
2005 Isuzu npr diesel 4 check engine light on runs and drives
2005 Isuzu npr diesel 4 check engine light on runs and drives but no turbo power took off egr motor, no change do not see waste gate operating when motor reved waste gate accuator works with air hose … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
2001 Isuzu NPR V.I.N. 17006703 Engine 4HE1-XS Diesel 6 Cyl
2001 Isuzu NPR V.I.N. 17006703 Engine 4HE1-XS Diesel 6 Cyl 4.75 Liter 313,884 Miles Throttle pedal stiff, truck fuel pedal stcks and causes truck to accelerate out of control. Truck has to be put into… read more
Dieselman36
Dieselman36
High School or GED
1999 w4500 gmc- isuzu truck cranks up runs 30 seconds then
1999 w4500 gmc- isuzu truck cranks up runs 30 seconds then goes to rough runing and looses power at the timing solenoid , changed fuel injection pump, changed engine computer, flywheel sensor,still no… read more
Expert
Expert
I have a 2003 Isuzu NPR. Engine (4HE1). The engine will start
I have a 2003 Isuzu NPR. Engine (4HE1). The engine will start and idle fine, when the the engine is put under a load it will start to put out a large amount of black smoke. (I believe unburned fuel). … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
We have a 2003 Isuzu NPR with the 4 cylinder turbo diesel engine.
We have a 2003 Isuzu NPR with the 4 cylinder turbo diesel engine. The truck has a little less than 100,000 miles on it. The truck is not driven often, and frequently has relatively long periods of bei… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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