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Old 03-26-2018, 08:30 PM   #1
alex_eats_rice
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Engine idles @ 2K RPM when in motion, normal when stopped???

My JDM H22a is acting up on me. When the engine is warmed up it feels like it doesn't have full power available and I can feel a hesitation or stumbling upon acceleration.

If I start the car, drive it right away without letting it warm up at all, it pulls hard, spins tires in 1st gear, pulls good acceleration on low RPM all thru the rev range in every gear..

Once it's warm it feels like half powered or something. Doesn't pull good from low rpms and VTEC engages but acts funny and doesn't really pull like should.

That's my secondary problem at his point. When driving, the Idle revs by itself to 2000RPM..
Sometimes when it's cold it idles lower.

I took off and cleaned my IACV earlier and sprayed it with Carb Cleaner, was pretty dirty.
Started it, did same thing, revs at 1K RPM when at a stop, but at any motion the rpms shoot to 2K RPM "Ghost Revving"

I'm down here I Washington, from Alaska, with my GF and my Father. When we got here I had to change the Battery, Alt, Alt belt, PS belt, new Battery ground wire, NGK Spark Plug Wires, Main Relay. It runs, but not as it should. Starting to think I have an Automatic ECU...

Anyone have any thoughts on why my car is acting like this?
Shipping my cb7 back to AK on April 4th in Seatttle. Want it running as good as I can get it before it heads up because parts are harder to come by up there.

Last edited by alex_eats_rice; 03-27-2018 at 02:29 PM.
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Old 03-27-2018, 01:06 AM   #2
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Have you checked for vacuum leaks? Get a squirter bottle and fill it with soapy water and spray it on your vacuum likes with the engine running.
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Old 03-27-2018, 01:40 AM   #3
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Quote:
Originally Posted by CB7_Saloon View Post
Have you checked for vacuum leaks? Get a squirter bottle and fill it with soapy water and spray it on your vacuum likes with the engine running.
I hadn't tried that yet but will tomorrow
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Old 03-27-2018, 05:37 AM   #4
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First, you should never beat on you engine when it’s cold. That is really, really bad for it!

The surging idle is likely your iacv or fitv. Clean and adjust, or replace. They’ve both been discussed extensively on here.

The power loss at operating temp suggests a bad o2 sensor. Does your cel ever come on?
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Old 03-27-2018, 02:35 PM   #5
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Quote:
Originally Posted by CB7_Saloon View Post
Have you checked for vacuum leaks? Get a squirter bottle and fill it with soapy water and spray it on your vacuum likes with the engine running.



OP dont do that. You can spray carb cleaner in short bursts around vac lines and gasketed intake surfaces, or take an unlit propane torch and probe around, when you hear the idle change youve found the leak.

Have you tested the TPS, make sure its connector is seated correctly, clean connectors etc. Have you tried pulling codes?

Quote:
Originally Posted by deevergote View Post
First, you should never beat on you engine when it’s cold. That is really, really bad for it!

The surging idle is likely your iacv or fitv. Clean and adjust, or replace. They’ve both been discussed extensively on here.

The power loss at operating temp suggests a bad o2 sensor. Does your cel ever come on?

Also, testing the IAT sensor is a good idea, you can use an ohm meter and a hair dryer




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Old 03-28-2018, 03:08 PM   #6
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Thi's is something some DSMers do to check for boost leaks, so figured it would work the same.

Quote:
Originally Posted by illinois_erik View Post



OP dont do that. You can spray carb cleaner in short bursts around vac lines and gasketed intake surfaces, or take an unlit propane torch and probe around, when you hear the idle change youve found the leak.

Have you tested the TPS, make sure its connector is seated correctly, clean connectors etc. Have you tried pulling codes?




Also, testing the IAT sensor is a good idea, you can use an ohm meter and a hair dryer




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Old 03-28-2018, 08:10 PM   #7
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Quote:
Originally Posted by CB7_Saloon View Post
Thi's is something some DSMers do to check for boost leaks, so figured it would work the same.
I've done it several times. It works for Honda's too.
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Old 03-28-2018, 10:12 PM   #8
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Works on boost leaks not vacuum. Try cleaning the throttle also.
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