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My isuzu kb 250 is having a hard start in the morning and will idle rough and picks up later. but when you try to accelerate it looses power and cuts off or cuts off at intersections when I slow down. It then settles later during the day and will drive relatively okay. We have tried to change the glow timer but did not change. We also disconnected one of the sensors on the Thermo housing, still this morning did the same. I also bypassed the lift pump but still it cuts off Please assist with solution and diagnosis

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Wow NO YEAR CAR STATED are you kidding?
what country you just posted a non usa car on a usa forum.
so what engine>? cant fix engine (any) not knowing that.
seems like Diesel, (Glow plugs)
seem you are guessing?

if diesel is it direct injection? we cant guess that either.
but if it is ,ever use a scan tool;?

what car, kb250 something, is it a pickup truck
what engine,
what country.
what miles.
is fuel good? did car sit long, a year?
do not disconnect sensors. ever.
nor bypass pumps, ever. (cept a few minute test) but bypassing pumps invites blowing the H3LL the injector ECU. big bucks that.
the pumps are run this way to prevent CRASH on burn , like seen on TV, ever see one for real.? not pretty, (cant unsee that.... ever)

Posted on Apr 22, 2015


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SOURCE: bogs when accelerating from an idle, rough starts.

listen for a vaccum leak.also try disconecting bat for 5 min the reconnect and start truck and hold idle at 1500-2000 for 5 min. this resets and teaches computer to self adjust

Posted on Nov 16, 2008

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SOURCE: isuzu 2001 diesel engine won't start

cant start deisel 3.0 lilter sounds like there is no fuel getting to the engine

Posted on Feb 15, 2009

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SOURCE: 1999 Ford Windstar, idles rough, slow acceleration

sounds like a large vacuum hose was knocked off the engine when they pulled the trans out, have that checked.

Posted on Mar 26, 2009

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SOURCE: hesitation during acceleration

could be the type of plug you are using.I was told only to use ngk plugs.I recently put bosch plugs in my mazda 3 and the check engine light came on and it started missfiring.

Posted on May 03, 2009

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SOURCE: jeep shuts off while driving

turning over is cranking (different words for same thing) You need to do some testing to determine what is failing. Good guess would be the crank sensor however without testing, you may not solve the problem by just replacing it. I suggest you obtain a decent manual such as chilton or haynes and using a digital multi-meter, perform the tests on your sensors outlined. Since the problem is intermittent you need to test both when working and also when in "no start". Testing helps avoid changing non-failed and expensive components, and is always the best thing to do before buying parts.
No one here can tell you what's wrong simply because no one can do that essential part of diagnostics by "long distance"
Good luck!! (if you need help with anything you discover, feel free to ask!!)

Posted on Nov 01, 2009

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