D16Y8 SUPER LOW IDLE (NEED HELP FAST)

1917 Views 11 Replies 4 Participants Last post by Bi9guns, Dec 30, 2020

Naruto Uzumaki

Discussion Starter · Dec 19, 2020

I have a 96 vtec civic had a bad engine so I swapped to a used one I found. It is a turbo engine. But I took it off and am running a stock ecu and fuel Injectors. The car will start but idle super low to the point it will shut off in a couple of seconds. I've moved the idle screw and advanced the distributor all the but it wont stay where it should. At one point it was running at 750 where I should be and then I shut it off and came back to test drive it and the idle was back to being super low. Sometimes the idle will surge from low idle to 1000. I've tested the map and tps.

Engine Automotive engine part Automotive air manifold Auto part Metal

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slo_eg8

· #2 · Dec 19, 2020

did you do the factory idle re-learn as per the manual?

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Naruto Uzumaki

Discussion Starter · #3 · Dec 19, 2020

slo_eg8 said:
did you do the factory idle re-learn as per the manual?

Yes I've done that but still nothing

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mattliston

· #4 · Dec 19, 2020

The fact that it doesnt idle even with the screw removed (ASSuming the idle screw hole is clean) tells me mechanically it is out of timing, or the motor is creating a lot of laod somewhere, whether that be internal friction form something BAD, an alternator trying to put full load down, or another accessory that is acting up, such as power steering.

Remove the accessory belts and try idling again. If it suddenly acts extremely lively, might want to check alternator and power steering for damage or hard-to-spin by hand.

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mattliston

· #5 · Dec 19, 2020

Wow, I forgot to even include the IACV.
remove the IACV, unplug the fuel injectors and unplug the distributor. Now have a buddy crank the engine over while you feel for vacuum where the IACV was mounted.

Dont let the injectors or distributor get powered up, no need to have the engine cold rev to the moon.

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Naruto Uzumaki

Discussion Starter · #6 · Dec 19, 2020

I dont think it's that bc it will fluctuate rpms

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Naruto Uzumaki

Discussion Starter · #7 · Dec 19, 2020

mattliston said:
Wow, I forgot to even include the IACV.
remove the IACV, unplug the fuel injectors and unplug the distributor. Now have a buddy crank the engine over while you feel for vacuum where the IACV was mounted.

Dont let the injectors or distributor get powered up, no need to have the engine cold rev to the moon.

And I've checked for vacuum leaks and it doesn't have any

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mattliston

· #8 · Dec 19, 2020

what was your method for checking for vacuum leaks?

Mine, if its not a fancy car, is to use carb cleaner or brake cleaner and listen for the revs to increase

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Naruto Uzumaki

Discussion Starter · #9 · Dec 20, 2020

mattliston said:
what was your method for checking for vacuum leaks?

Mine, if its not a fancy car, is to use carb cleaner or brake cleaner and listen for the revs to increase

That's the way I used

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mattliston

· #10 · Dec 20, 2020

Then I would remove the belt, fire up car, see if it idles low. if it does, remove the brake booster vacuum line or the PCV line and see if it idles up.

If it doesnt even try to get up to 3k rpm or so, then your motor is fucked. Something is creating a ton of friction, or timing is so bad that the engine is fighting itself and is trying to fire way out of cycle.

Take teh distributor cap off and make sure the disty rotor is facing #1 cylinder with the cam gear lined up

Something is not right, or something was way overloooked. happens to anyone

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Naruto Uzumaki

Discussion Starter · #11 · Dec 20, 2020

mattliston said:
Then I would remove the belt, fire up car, see if it idles low. if it does, remove the brake booster vacuum line or the PCV line and see if it idles up.

If it doesnt even try to get up to 3k rpm or so, then your motor is fucked. Something is creating a ton of friction, or timing is so bad that the engine is fighting itself and is trying to fire way out of cycle.

Take teh distributor cap off and make sure the disty rotor is facing #1 cylinder with the cam gear lined up

Something is not right, or something was way overloooked. happens to anyone

I'll try that today I'll let you know what happens

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Bi9guns

· #12 · Dec 30, 2020

Your IAC valve may not be opening. Cleaning it may help or get a new one.

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