92 stock ka24de its pinging on acceleration ... air/fuel goes up to 18:1 as soon as you hit the gas when the engine is hot.. it does not do it cold.. replaced fuel filter, and ran an octane booster which help but its still there... 1 good question for you.. the test for the egr cut sol. is to check the ground signal from the ecu.. "light green wire" .. when you hit 2000 rpm its supposed to send a ground to make the sol. click.. which it doe sbut only for a split second.. the it goes back to rest.??????? the manual does not say if its supposed to stay at ground when your over 2000??? also check all-data and it doesnt say either.??????
now that means that the egr is not being allowed to circulate exausht gas right???? so could that be making it run lean?? codes .. yes i got egr and knock codes.. replaced knock sensor checked wiring checked vaccumm to egr and checked bpt diaphram all ok.. took off egr its way clean..
my thaghts are that the ecu is bad not sending the right ground pulse to the egr cut sol. in turn not letting the egr valve do its job. the car goes lean because of it the that makes the knock sensor go off and retard the timing making it worse????? any hints?? or more tests i can do???
pinging
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left channel audio
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Unless the ECM sees a speed it may shut down the EGR solonoid. The egr solonoid comes on when the hard idle contacts open, that is how it usually works, forget the specific rpm range. Just move the throttle till you hear the relay energize. Is your car a federal model or calif? if its cal it has an egr temp sensor. If it has this sensor the code can be generated for either electrical malfunction of the relay or EGR flow which is what the temp sensor sees. Do an ohms check on your EGR relay should be somewhere between 20 and 40 ohms. if it is lower the ECM will stop trying to operate it as it is protecting itself from being fryed.
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s13sr20chris
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Re: pinging (left channel audio)
lack of egr flow can cause pinging but will not cause a mega lean condition(just a little lean condition). try unplugging o2 sensor and driving like that. whats your maf voltage during lean condition?
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left channel audio
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- Car: 92 240sx se
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left channel audio
- Posts: 57
- Joined: Sat May 28, 2005 5:57 am
- Car: 92 240sx se
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so i tried to smog it today and it failed bad.... high nox and hc @30deg btdc.. so i try to time it and it wont go to 20 i stabbed that bastard 25times.. one tooth is to far one way and the other tooth is to far the other way... i gonna try to smog it again tommorow when its cold that way the ecu doesnt mess with the timing like that and see what happens.. it has a brand new cat.. so im guessing that something is messed up that doesnt trip the cel.. cause its still not on..