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1991 isuzu npr prime fuel system

How to prime the fuel system in a 1991 isuzu npr diesel

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  • Anonymous Mar 16, 2014

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Normally the primer is on the filtre and bleed screw there too
what i normally do is fill the fuel filtre with clean diesol and fit and then prime if you r have=ing real difficulty you could open pipes going to injectors and turn over ttill you see the diesol coming from pipes ,but normally just prime it it should start

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

  • 34 Answers

SOURCE: a/t oil temp light come on 1999 isuzu npr diesel

Check your trans fluid and inspect for leaks asap. If level is good and leaks are none to minimal, I would suggest a new trans cooler. Your current one could be clogged.

Posted on Nov 23, 2009

  • 324 Answers

SOURCE: isuzu npr 5.7 gas not starting on its own

sounds like its time to replace the fuel pump.

Posted on Feb 05, 2010

  • 1796 Answers

SOURCE: I need a Fuel Injection

Go to this site to download a manual.
In case it does not work, go to this site to look for the info. you need
Good luck!!

Posted on Sep 28, 2010

  • 1 Answer

SOURCE: 2000 GMC W3500 diesel (ISUZU NPR),cranks but no

fuel line pick-up broken in the fuel tank

Posted on Feb 14, 2011

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1 Answer

2007 Isuzu npr 5.2 diesel no power codes p1093 and U010C clear codes power comes back runs good until check light comes back on then no power same codes come back p1093 first then U010C William

Here are the main causes for the code,
Clogged Fuel Filter Fuel system leakage Faulty fuel injector Faulty Fuel Rail Pressure (FRP) sensor Faulty Fuel Pump

Read more:

Jul 20, 2017 | Isuzu Cars & Trucks

1 Answer

How does a isuzu 250 freeighter get power on the dieselpump and injectors and trough witch fuse does it work

does it run? no symptoms stated just a hunt.
no year car(heavy truck)???

no country
NPR or what? lots of trucks under Freighter,banner.
the 3L diesel
direct injection type? correct? (and PCM to run it)
scan it after checking fuses?

we'd not spend all day looking free books
we see all fuse if they look bad,THEY ARE
if look good, test them , they can bad.
a voltmeter check is super fast.(key on)
if pump has power,why look for fuse.
filters clean
fuel lines primed.
if lift pump is it working?
scan the pcm for errors.
glow plugs ok.

Feb 24, 2017 | Isuzu Cars & Trucks

1 Answer

I don't know how to change fuel pressure regulator in my Isuzu 2007 NPR can somebody give me a hand on that

this is no heavy truck forum. its only light and cars.
NPR what, (the number)
and what engine? fuel parts match up to and engine.
no year NPR. wow. and have gas or diesel engines.
no fuel stated either.
NPR started in USA in 1985 (this is USA forum)


May 04, 2016 | Isuzu Cars & Trucks

1 Answer

I have an isuzu npr it's a 6/91. Wednesday night at idle the truck revs itself up maximum rpms. What would cause this is it something to do with the fuel?

wow, a real photos, how cool, like the 2nd one here ever or 1st.
but in what country? this is USA forum, with zero data on
cars not here.
the problem is what engine is there.
diesel or gas.
and what is the displacement.
we have like 1000 posts here on NPR , an not one answers even 1 question asked, i cant guess why or whats UNDER that hood.

hot engine races
cold or both?
what engine.
what RPM is high, 1000, or 3000 ?
if gas engine, vacuum leaks top that list.
on diesel? , injection problems many.

it has to do with air and fuel controls on all injected engines.
if gas, it can even be, OMG a CARB fueled.

Feb 17, 2016 | Isuzu Cars & Trucks

1 Answer

Does anyone know where the main fuse box is located in a isuzu npr diesel truck not sure of the make I'm estimating somewhere in the 1990s

what fails?
what country?
what exact engine? boxes vary by engines, fuel systems , spark and EFI used in that country.
what exact body, NPR something.npr 200, 300 ,400,500,_Inc.#1991
or if not in USA this....

is it gas or diesel>? CNG? 300.

what year.? surely it has a VIN, and that has YEAR.
the books are ALL made for one year. (accurate.....!)
and if you cant know that, how can anyone look it up for you.?
this is a USA forum and our books don't match yours. (if not usa)
and if we look it up in, it will be USA answers.
and you cant find a fuse box in under 5min works , under dash and hood.? i find that hard to believe..... ? but answers above will help 100x better.
dash under, kick panels, behind glove box. ? (covers that hide them)
then under hood how can a fuse box hide ,its in plain site if there.

Apr 18, 2015 | Isuzu Cars & Trucks

1 Answer

No fuel pressure coming out the injectors of my 1999 isuzu npr diesel truck

fuel pump shot or fuel injectors plugged also check for loose wiring by your tank or by the injectors

Jul 14, 2014 | 1999 Isuzu Trooper

1 Answer

Npr diesel leaks air when primed why

Check all fuel lines for leakage

Nov 13, 2012 | Cars & Trucks

1 Answer

2000 Isuzu Diesel 4wd wont start

make sure the battery is good, to make good start. if it is still don't go, need to check fuel filter then prime the system. 85% of the diesel engine the problem is the fuel system.

Feb 28, 2011 | Isuzu Rodeo Cars & Trucks

2 Answers

Isuzu npr 5.7 gas not starting on its own

ok I had same problem with my 1996 Isuzu npr 5.7 gas burner. on top of fuel tank are wires and cant remember if it was 3 or 4 but anyways one of those wires is your ground wire to the fuel pump its self. make sure the wire has a good ground on the frame and/or the bed body of the truck. wish you the best hope I could help you

Feb 05, 2010 | 2001 GMC W3500

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