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5th gen electrical problems...

 
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Old 12-06-2008, 04:02 PM
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5th gen electrical problems...

I have a 1998 Prelude (base model) 5 speed, with a new professionally rebuilt long block (H22A4, close to factory setting). I just dropped in the new motor and after replacing the battery and replacing old fuel with new (car has been sitting for almost 3 years) I was able to start the car. Here is where I have multiple problems... The car starts and idles almost no problems when the engine is cold. However when the engine reaches operating temperature (same time the thermostat opens) the engine begins to act funny. As I read schmatic diagrams I understand that my fan motors on the radiator engage as soon as the thermostat opens which is controlled by the ECT sensor (I think). Sometimes the car dies as soon as I hear the fans clicking over, sometimes the car will misfire badly and require manual (me giving it gas) help to stay running. However the car does not want to run after its been warmed up and it's almost impossible to start, until it has cooled. When the engine is idling after a cold start up the timing for the engine and the distributor seem right on time. I cant find anything mechanically wrong with the car. I've ran a computer diagnostic test with a CodeScout 700 Code Reader for all all OBD2 compliant here are the results:
Note - "1 code, MIL on, monitrs, 4 inc and 4 ready" are not codes but sub catigories for the testing device.

*1 CODE
P1362 (HONDA CODE FOR TOP DEAD CENTER SENSOR)
*MIL ON (BAD FOR EMISSIONS?)
*MONITRS (MONITORS)
*4 INC (4 INCOMPLETE) <--MEANING NOT ENOUGH FAULTS TO CATAGORIZE AS "READY"
CATLYST (CATALYST MONITOR)
EVAP (EVAPORATIVE SYSTEM MONITOR)
O2 SNSR (OXYGEN SENSOR MONITOR)
EGR (EXHAUST GAS RECIRCULATION)
*4 READY (4 READY WITH ENOUGH FAULTS TO CALL OUT BAD OR APPEAR SO)
MISFIRE (MISFIRE MONITOR)
FUEL (FUEL SYSTEM MONITOR)
COMP (COMPREHENSIVE COMPONENTS MONITOR)
O2 HTR (OXYGEN SENSOR HEATER MONITOR)

-----I have ran the test several times while erasing them after the results. These "codes" are very persistant and I'm convinced that they will continue to haunt me until I know where to look first. One more thing, when I'm running the test on my idling car the check engine light immediately appears after I've cleared all codes. I have some more information about this project, however I'm not trying write a novel. My car has an AEM cold air intake after market header and exhaust. This car was also worked on by some idiot that installed an H22A about 3 years ago. The swap didn't work and now this is where I am. I'm not a mechanic or electrician, just a do it yourselfer.

If someone knows more about this then me I would appreciate the help as I have almost reached the end of my rope!

Last edited by neoiat1; 12-06-2008 at 04:12 PM. Reason: adding more information
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Old 12-07-2008, 12:07 PM
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Re: 5th gen electrical problems...

I'm pushed to a fuel problem it sounds like.

Thats a good bit since it had been run. Cars that sit like that are a biotch to get back to running at par.

What kind of shape was the gas tank in, did the gas smell tarnished? Maybe water in the tank? Oh man the possiblilities.

Good luck

I had a 2nd Gen that sat for a while it just took running that thing for a while and also locating all the vacuum leaks and that thing ran like a top after a few months.
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Old 12-07-2008, 05:18 PM
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Re: 5th gen electrical problems...

I really dont think it's a fuel issue and this is why. I removed my fuel tank drained all the gas and completely purged all all fuel in the existing lines. Next I filled the tank quarter full of 92 octane shell gas and about 12 ozs of 190 proof everclear and rocked the tank back and forth to mix all substances. I drained the tank and found little foreign material. I installed the empty tank and filled the tank half full of 92 octane and stp octane booster and repurged the lines while my fuel line going to the fuel rail was disconnected. fresh gas came out shortly. next I depressurized the fuel system and replaced my fuel filter. The only time my fuel system has been in better shape was when it came out of the honda plant! The problem is electrical no doubt. Thanks for the concern tho!!
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Old 12-07-2008, 06:31 PM
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Re: 5th gen electrical problems...

Well like I said the possiblilities

did you go any farther with the fuel system, meaing after the FPR and or rail and injectors?

Just trying to help

Your saying its running fine while warming up but once it gets to temp it craps out?

I had a Nissan truck that seemed to do this as well, do you notice if it is any worse if it is raining or wet outside? As mine did, it happen to be the dizzy. Not sure that helps but good luck.
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1998, 5th gen, electrical, engine swap, h22a4


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