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Isuzu 4hf1 truck acceleration system fails to acelerate

It idles but no acceleration

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  • Isuzu Master
  • 20,706 Answers

Clean fuel filters yet, replaced?

Posted on May 12, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

mackinbeats
  • 46 Answers

SOURCE: 88 Isuzu truck (4 cyl) has terrible idle/black exhaust

did you check for vacuum leaks probably a vacuum hose thats been knocked off or eroded and needs to be replaced.

Posted on Apr 11, 2009

chitownbob45
  • 316 Answers

SOURCE: bogs when acelerate idles fine

clogged fuel filter or bad fuel pump.

Posted on Oct 17, 2009

  • 462 Answers

SOURCE: nissan truck idles fine, does not acelerate well, and misses

Try to disconnect MAF sensor(mass air flow sensor) or MAP sensor (manifold absolute pressure) , I don't know which one you have , (suppose to have either one) , when engine running and see if it becomes any better , if it did , then it's your problem.
Just remember one thing , if your check engine light is off now , it will be on after you disconnect any above mentioned components.
Easy to reset , disconnect battery for 30 sec.

Posted on May 27, 2010

  • 1 Answer

SOURCE: workshop manual for isuzu 4hf1

I need isuzu 4hf1 engine workshop manual.If any one got it please send it.
mesropeaccess@hotmail.com

Posted on Nov 16, 2011

  • 1 Answer

SOURCE: I NEED THE TIMMING FOR

what the timing injectiom pum of 4hf1

Posted on Nov 21, 2011

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1 Answer

What is the fuel pump injection timing degree for isuzu 4hf1?


no car stated?
no country.?
no year.?
(i guess you dont KNOW the books are indexed by above)

strike 3, out.

i scan the world and see

Applications include the 2003 Isuzu NPR400
  • The 4HF1 is an OHC direct injection engine of 4.33 L capacity. Peak torque is 285 Nm at 1,800 rpm, peak power is 116 PS (85 kW) at 3,200 rpm. Bore is 112 mm, stroke is 110 mm"


dis beast?
26335802-lfvi2b44iwkqit5d2rqve4gf-5-0.jpg

Nov 01, 2016 | Isuzu Cars & Trucks

1 Answer

My isuzu 4hf1 engine failed to start?


not starting can be from several reasons
cam/crank position sensors failing--wiring -units ---broken timing belt /chain
immobilizer not working properly--flat battery in key fob-- fuse has been removed and replaced
ignition control module failure
injector problems
low fuel pressure from pump not working
the idea is to run the fault codes to get some idea of the area to start checking and work from there

Jul 10, 2016 | Isuzu Cars & Trucks

1 Answer

I want to know how to put the timing head in the cylinder of Isuzu 4hf1 can you please explain to me thank


no country stated, no car stated. no year, stated,
so must be 4hF1 sitting on a work bench or stand.?
sure.
so now i have to guess all that ? the books are indexed first by country then year, etc.
wiki search shows... it's from a huge truck, right?
GCM=17636 lbs loaded./
1998 Isuzu NPR200

4.33 L diesel engine.
id say use google ,or duckduckgo to find free books online
using engine number,

like this, and do your own research.

https://duckduckgo.com/?q=4hF1+PDF&ia=web

May 05, 2016 | Isuzu Cars & Trucks

1 Answer

How a you o pliz I need timing marks for isuzu 4hf1


no truck name, or model
no year, stated
no country sold. strike 3 huh?
The 4HF1 is an OHC direct injection engine of 4.33 L capacity.

injection pump timing?
good luck, no books here on that engine , in usa.
try posting to a Isuzu truck forum in your country
google just like that....

Dec 13, 2015 | Isuzu Cars & Trucks

1 Answer

What is the torque of connecting rod bolt and cylinder head bolt of Isuzu 4hf1


no year car, no model.
so you hoping all years, 4hf1 are same. why assume that.
its only rods, LOL

Apr 14, 2015 | Isuzu Cars & Trucks

1 Answer

How to aligned timing set mark on isuzu 4hf1 engine?


Bernard , start a new post, ?

what car,?
what year.?
what country.?

google for it , or buy the book on unstated car.

or search here,

http://www.fixya.com/search.aspx?ref=ser&s=isuzu%204hf1&


or

https://duckduckgo.com/?q=isuzu+4hf1+pump+timing+marks&ia=videos


try searching/
much>?
my guess is this is a huge ELF truck?
not a car,
no a light truck?

Nov 05, 2011 | Isuzu Cars & Trucks

2 Answers

I NEED THE TIMMING FOR AN ISUZU 4HF1


what the timing injectiom pum of 4hf1

Aug 19, 2011 | Isuzu Pickup Cars & Trucks

2 Answers

Workshop manual for isuzu 4hf1 turbo charge engine, ECU


I need isuzu 4hf1 engine workshop manual.If any one got it please send it.
mesropeaccess@hotmail.com

Oct 30, 2010 | Isuzu Trooper Cars & Trucks

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