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I have problem with high reving, on a Isuzu Direct injection. Engine light glows, i suspect air cleaner system. Am i right how do i fix it?

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  • Isuzu Master
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Again,
no country stated.
no car stated,just ISUZU
are you in africa.. with africa only KB truck that it?
no year stated
no engine stated, no diesel words or petrol words.???
I say strike 3 your out (like baseball) actual 4.
why post like that, nobody on earth can guess whats under that hood, lacking all facts , missing.
we'd be like Carnac .
the engine lamp, called CEL ,means
1: scan it, you didnt
2: or get the car service, you didnt.
or? guess endlessly..
sure the IAC/ISC can stick open. sure.
so can vacuum leaks. do that on gasoline engine, with speed density fuel injection systems. (map sensors engines)

next time start with country
and even a photo of your engine,
and fuel type.
a win/win

or you will get bad answers, my guess, 100% in this case.

Posted on Dec 13, 2016

  • Anonymous Dec 15, 2016

    it's a diesel right?
    is this yet another African Isuzu KB truck
    now year and no engine stated question
    got 1000s like it , that go now where
    we dont have KB trucks in USA<
    this is a USA forum,.
    do you scan the PCM? yet?

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  • Expert
  • 236 Answers

The IAC controls the idle tap on it and if it makes the idle better then install a new one problem fixed

Posted on Dec 13, 2016

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the check engine light
means!
1: get car serviced. now.
2: if DIY? scan it. your self. and see what DTC you have....

all cars made in usa, 1988 to now. (about)

clean filters done at the service points?

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some newer J engines are direct injected.
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post real engine names.
and country

or google, "diagnosing direct injection"



.

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in what country?
what year ELF.?
wiring,of what?
the whole truck, or just engine, electrics.
Isuzu sells a book, that covers this, ask them yet?
as you can see its direct injected.
and injections systems are not the same for every country. (smog laws. etc)
get it scanned yet.
no job stated, no problems stated, no symptoms stated.


this engine is:
The 4HL1 is a common rail direct injection OHC 16V high-pressure fuel injection system diesel engine of 4.777 L capacity with electronic control system. Peak torque is 333 Nm, peak power is 140 PS (103 kW) at 3,000 rpm. Maximum torque is (34.0 kg m)'/1,500 rpm. Bore is 115 mm, stroke is 125 mm.

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Wikipedia

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