JDM GSR No VTEC
So recently my engine has decided not to let VTEC engage and I am looking to see if anyone has some insight on underlying issues that I have over looked.
History: I have a Jdm GSR OBD1 swapped into a 93 Civic SI running on a chipped P30 ECU(engine has been in the car for about 2+ years now). Everything has been running flawlessly until now. It throws the Check engine code: 21(VTEC Solenoid) I have done the following with no resolution to the problem. - checked all wiring to the VTEC solenoid & pressure sensor - replaced VTEC solenoid screen - checked engine temperature sensor/wiring - checked oil level/pressure I know the VSS can cause VTEC to not engage and my speedometer works about 90% of the time but I’ve had this issue since I got the car in 2003 in which VTEC had always worked. To my knowledge all that leaves now is my ECU? Any help would greatly be appreciated. |
Did you check the knock sensor?
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That I have not done, I'll take a look.
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after you changed that did the cel go away?
did u reset the ecu? disconnected the battery? |
I did disconnect the battery for a little bit. The CEL will clear but once the car is taken over 5800 RPM the CEL comes back on.
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not the optimal ecu configuration to run that particular engine
try a stock ecu and see what happens |
and that is going to do what? cause a code 21?
if its chipped ecu the knock is probably disabled :type: |
That's what i had figured, I am currently trying to source an obd1 P72
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or even just a stock p28 to run it to see if the code pops up :type:
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did you do any recent maintenance or anything in particular to the car recently? or it just kinda randomly happened
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I'll give my P28 a shot and see what happens :thumbup:
If only I had received the right ECU with my motor from HMO but they shipped an OBD2 ECU, which instead of exchanging it I just sold it :flush:. |
ecu is still finding vtec sol? Once upon a time my "chipped" ecu wouldnt engage vtec and ran like shit. Re-loaded the tune and all was fixed.
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Didn't see the part where it was a chipped ecu.
And the knock senor could cause VTEC not to work. :beatdeadhorse2: |
Yeah, Just randomly happened. The car is pretty much a dedicated fun/track car so I drive it maybe twice a month if that.
Here's the story of how it happened: I did a small pull in it, once it surpassed 5800 rpm the CEL came on and no VTEC. I ran the code and it was for the Coolant temperature sensor. I noticed 1 of the two wires to the connector had pulled out of the connector, so i fixed that. Started it and no CEL appeared so I let it warm up and took it out for a spin. I did another pull and once again CEL cam on after i passed 5800 rpm and no VTEC. Checked the code and it was for the VTEC solenoid. |
and have you reset the ecu since? :type:
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I have not, I'll reset the ECU and try again.
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480-760-3312 text this guy he may have an obd1 gsr ecu
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yes but do you know which obd1 gsr ecu it is? :type:
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P72-003 or P72-a01?
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p61 is obd1 gsr and so is p72 :type:
but one is b17 and the other is b18c |
Since i have a stock intake manifold w/ the secondary intake butterflys I'm leaning towards needing the P72 over the P61. Right now i am weighing the options of either picking up a P72 or just forking out the buck and getting S300 for my P28.
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well the only one to run a b18c stock is the p72. i was just pointing out that there are 2 gsr obd1 ecu
i would go hondata s300. you wont regret it :type: |
If he has a gsr ecu it is a p72 he has a 95 gsr
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yes but you didnt know that at first :type:
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Still having engagement problems?
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thats what she said :grin:
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Oh you! :whip:
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Update:
My p30 ECU is fried, ran it with the p28 and VTEC engaged with no CEL. Looks like I'll be ordering S300 very very soon. Thanks everyone for the input |
i know a guy who can get one :guns:
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Nice dude! <Vtec
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