Hesitation Back after Resetting ECU?
05-16-2006, 09:53 AM
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Hesitation Back after Resetting ECU?
A couple of months ago I posted about this problem and how I was able to fix it. (https://honda-tech.com/zerothread?id=1442221)
Basically, the symptoms:
When starting cold, car runs great. Pulls hard in all gears and RPMs but as soon as the car gets warmed up (usually in about 5 mins), anywhere from 1500 to 4000 rpm car pulls like a donkey! (As in really slow) Once in VTEC though it pulls better.
No check engine light or code... BTW this is a JDM H22a in a 93 SRV (Si VTEC in the STATES)...
Things done trying to solve the issue:
1. New header ... no change
2. New cat ... no change
3. Swapped the mapping sensor ... no change
4. Advanced timing ... no change
5. Cap and rotors ... no change
6. Inspected wires and sparks ... did not change since they looked good.
I solved the problem with replacing my spark plugs with Honda recommended ones. Instantly the car pulled better and I thought I had the problem solved!
…
Until last week, I was having trouble with my alarm system (it was not disabling with the remote). So I disconnected the battery terminal for 30 seconds in order to reset the alarm and consequently reset my ECU!
Right after the hesitation problem was back!
It has me stumped now because I don't see how just resetting the ECU can cause hesitation!!??
Any ideas … I hate this hesitation!
Basically, the symptoms:
When starting cold, car runs great. Pulls hard in all gears and RPMs but as soon as the car gets warmed up (usually in about 5 mins), anywhere from 1500 to 4000 rpm car pulls like a donkey! (As in really slow) Once in VTEC though it pulls better.
No check engine light or code... BTW this is a JDM H22a in a 93 SRV (Si VTEC in the STATES)...
Things done trying to solve the issue:
1. New header ... no change
2. New cat ... no change
3. Swapped the mapping sensor ... no change
4. Advanced timing ... no change
5. Cap and rotors ... no change
6. Inspected wires and sparks ... did not change since they looked good.
I solved the problem with replacing my spark plugs with Honda recommended ones. Instantly the car pulled better and I thought I had the problem solved!
…
Until last week, I was having trouble with my alarm system (it was not disabling with the remote). So I disconnected the battery terminal for 30 seconds in order to reset the alarm and consequently reset my ECU!
Right after the hesitation problem was back!
It has me stumped now because I don't see how just resetting the ECU can cause hesitation!!??Any ideas … I hate this hesitation!
05-16-2006, 10:35 AM
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Re: Hesitation Back after Resetting ECU? (1PreludeWanaBe)
i have the same problem. What plugs did Honda give you? All i know is it could be your O2 or you knock senser. Thats what people have told me. I have replaced just about everything you have.
05-16-2006, 12:08 PM
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Re: Hesitation Back after Resetting ECU? (H22-VTEC)
I had this problem and replaced just about everything that was recommended, then I bought a P28 ecu (chipped) eliminating my knock sensor and problem solved.
Not saying you have to do the same thing but I would look into your knock sensor, it seems to be a pretty common problem with the H22.
Not saying you have to do the same thing but I would look into your knock sensor, it seems to be a pretty common problem with the H22.
05-17-2006, 09:39 AM
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Re: Hesitation Back after Resetting ECU? (SpeedFreak77)
I would agree with you 100% but I just don't understand how reseting the ECU effected the knock sensor ...
05-17-2006, 11:32 AM
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Re: Hesitation Back after Resetting ECU? (1PreludeWanaBe)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1PreludeWanaBe »</TD></TR><TR><TD CLASS="quote">I would agree with you 100% but I just don't understand how reseting the ECU effected the knock sensor ...
</TD></TR></TABLE>
I don't know either but I had the same problem, I had to reset the ecu a few times when messing with my timing and troubleshooting and sometimes the problem went away and then I reset the ecu and for some reason it came back.
</TD></TR></TABLE>
I don't know either but I had the same problem, I had to reset the ecu a few times when messing with my timing and troubleshooting and sometimes the problem went away and then I reset the ecu and for some reason it came back.
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