Question about 2001 GMC W3500

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2000 GMC W3500 diesel (ISUZU NPR),cranks but no start, has fuel..but no glow plug relay operation,,relay tests good...

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Fuel line pick-up broken in the fuel tank

Posted on Feb 14, 2011

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1 Answer

2004 isuzu 3liter diesel starts cold drive 3 miles stop try to restart engine management light comes on and engine turn over for ages before starting. runs with light displayed


no car stated? some huge NPR truck, What?
no country
why>?
we cant guess lights,ever, we in USA forum are 100% blind.
guess you lost the operators guide book,, oops, fail.

glow plugs bad. (by all means)
filters packed.
start ok with starting fluid spray easy???????

Feb 18, 2017 | Isuzu Cars & Trucks

1 Answer

My 2002 isuzu npr diesel f14 ign/ecu fuse blows about 20 seconds after starting. The glow plugs are on the circuit. It's not a direct short to ground. I'm can't find the right wiring schematic.


first off
no country stated
the books are indexed by
country
year 2002
isuzu NPR heavy truck
ask Isuzu for matching FSM book at your dealer.>
factory service manual.

shorts
remove all loads on the feed F14.
then add them 1 by 1 until it blows. bingo. last add is shorted
id bet ecu and glows are not same feed
glows suck huge current
ecu, nill

join a read isuzu forum
or heavy truck?

Feb 01, 2016 | Isuzu Cars & Trucks

1 Answer

I have Isuzu dmax it has a problem with starting In the morning it starts good when the glow plugs come on but after it has parked for 2 or3 hours it has to crank for about 3 min before the engine will...


what is the VIN
what is true engine name, gas or diesel and size.
what country. (tells me fueling systems)
did you check all fuses, i bet you dont know how to really test glow plugs only the see a light glow is not going to work.
so are glow plugs really working, proper voltage at them and right current flow (a meter works here, amps , using amp clamp)
filters clean.
scan it?

Mar 26, 2015 | Isuzu Cars & Trucks

1 Answer

1993 ford f250 7.3 liter diesel starting problems


It is worth ensuring the glow plugs are actually receiving current by attaching a test lamp during the starting process. Heater plug timer relays can cause problems.

A good cranking speed is necessary for good cold starting and also good injector spray patterns and break-off pressures. Bad spray patterns and low pressures, slow cranking and fuel drain-back are common problems.
Low compression pressures can also be a problem. If the other stuff has been checked and found to be ok it is worth having them tested.

Feb 25, 2015 | 1993 Ford F250

1 Answer

A Isuzu NPR 4hf1 rotary pump timing marks set


Hi. If it has a rotary pump, the pump needs to be installed with the crank at 49 deg BTDC on the compression stroke cyl 1. Mark dot gear on pump with white paint. Line up dot gear on pump with line on pump bracket and install. Remove PRM sensor from bell housing and check if line on pump gear is still lined up with line on pump bracket.

Feb 05, 2015 | Isuzu Cars & Trucks

1 Answer

1992 isuzu bighorn 3.1 turbo diesel, rebuilt injection pump, will not cold start


1: compression good.
2: glow plugs hot.
3: test fuel, does test fuel work??????
yes, you did it wrong
no, #1 or #2 caused.

Aug 27, 2014 | Isuzu Cars & Trucks

1 Answer

I have a 2000 gmc w3500 gas motor that has spark and fuel in the fuel bar but wont start,,and even if i put ether in the intake it won't start


How is fuel pressure? He must try to start with ether, If you turn crank by hand forward and backward you feel how much play in timing chain?

May 04, 2014 | 2001 GMC W3500

1 Answer

96 Ford F-350 Turbo Diesel. Replaced 4 glow plugs on driver side. After replacing the glow plugs and the glow plug relay, the truck will crank slow and not start. Batteries power drained quickly while...


Have a load test done on the batter to check for failing cells. For diesels to start any thing less than a fully charged battery good battery is a waste of time as the engine needs fast RPM to heat the air to ignite the fuel and slow rpm's just doesn't cut it.

Jan 19, 2014 | Ford F-350 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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