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93 Lude h22a1 Vtec rev hang and surging

 
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Old 05-24-2017, 11:11 PM
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93 Lude h22a1 Vtec rev hang and surging

hey guys been trying to find some info for awhile on this with no luck. Ever since getting my lude a few months ago whenever shifting between gears the car would hang at the rpm the clutch was pushed down on or even accelerate 1-200rpms and after a few seconds drop down normally. On cold starts the car also surges from 2-3000rpm and causes the car to buck pretty hard even in third. I replaced my FITV and TPS which helped a bit and my coolants been bled a few times I'm starting to suspect the idle air control as the car does not rev hang at all with it disconnected. I did take it off and clean the mesh, but no improvements. Hoping somebody has had the same thing and fixed it as a new IACV is 330$ from my local parts store. Any help or suggestions would be really appreciated.
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Old 05-25-2017, 02:23 AM
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Re: 93 Lude h22a1 Vtec rev hang and surging

hows your maintenance otherwise?

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Originally Posted by TypeT View Post
quick what to do list

usually these things fix bad idle or/and hesitations:

- new spark plugs & wires
- new distributor cap & rotor
- new air/fuel filters
- clean injectors/iacv/egr/fitv
- bleed the coolant
- new pcv
- adjust valves and ignition
- adjust idle from tb's screw and throttle cable
- check does sensors work properly: map, iat and tps (and try calibrating tps)
- then check wires, connectors and hoses

check o2 sensors and vacuum/exhaust leaks (check all the seals - IM/header/TB gaskets, injector seals, maybe even buy valve cover gasket set...)
check timing. after that: double check timing

clogged cat might you give some trouble as well (usually when driving) - check cats condition

those are basic maintenance as well.
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Old 05-25-2017, 11:45 PM
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Re: 93 Lude h22a1 Vtec rev hang and surging

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hows your maintenance otherwise?
Maintanence is pretty good oil changed 2000km ago newer plugs and wires fuel filter as well as the throttle body cleaned out. Stopped by a scrap yard today and found another EACV hopefully itll fix the problem.
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