Posted this in the civic forum with not much help......maybe i can get better respnse in the teg forum....kind of teg related!

I just swapped my 94 JDM GSR engine into my new 2000 civic hatch. The whole car has been converted to OBD1 with a OBD1 P72 GSR ECU. I am having a problem with the car misifiring/backfiring after i drive it hard (after a couple of 8000 rpm 3rd gear pulls). When it idles, i can hear the exhaust hum and then, there will be some random "poop" sounds. And i am loosing power between 3000 to 4000 rpm at partial throttle....almost feels like the car has retarded the timing on it's own or i have lifted off the throttle. I have noticed that this misifire only happens at partial throttle or idle. BUT, if i don't pushed my car, driving at 3000 to 4000 rpm all the time, the car will drive like a champ and idle solid at 850 rpm or so with no backfire what so ever.

Another symptom is that whenever the car is cold (in the morning), it will backfire but once it warms up, it will idle solid....that is until i push it hard and it wil start misifiring again. The car has new cap, rotor, and wires.

Since last year, i have had problems timing my car. Even with the distributor fully advanced, i can only get 16 degrees. All my timing markes line up and i have never been able to figure out why. I have even tried timing with 3 different timing lights with the same results. I am leaning more towards a failing distributor. Does anyone else have any other inputs or ideas they want to share??

UPDATE: I have tried a different perfectly working distributor (took it off my friend's car) last night with no help! So i have tried different plugs, distributor, and wires......still the same. Also, the plugs so look a little wet and black so confirmed that i am running rich......could it be my fuel pressure regulator? I am using the stock civic fuel pump and the stock GSR FPR.

 

It def sounds like your timing belt jumped a couple teeth. The thing that clued me in was the fact you couldn't get your timing set correctly. Pull off the vavle cover and check to see if these marks line up.

The two marks on the inboard part of the camgears. They didn't line up properly on the pic.


Then check to see these two marks line up.



Images property of Batoutahell.

 

sweet pics!

 

what wiggie said!! It probably jumped a tooth and make sure your nelt has proper tension or when you drive it hard it may jump a tooth again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Panda EK &raquo;</TD></TR><TR><TD CLASS="quote">what wiggie said!! It probably jumped a tooth and make sure your nelt has proper tension or when you drive it hard it may jump a tooth again.</TD></TR></TABLE>

Just checked my timing marks tonight.....everything lines up! So it didn't jump a tooth.....so frustrating!!!

 

It's hydraulic lifter, my friend.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Monchhichi R &raquo;</TD></TR><TR><TD CLASS="quote">It's hydraulic lifter, my friend. </TD></TR></TABLE>
I could be wrong, but I don't believe JDM GSR motors have hydraulic lifters.

 

Something still doesn't sound right if you can only get 16 degrees of advance out of it. Maybe try another timing gun?

Did you check the timing exactly like this article says?
http://www.c-speedracing.com/h...g.php

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WiggiE &raquo;</TD></TR><TR><TD CLASS="quote">Something still doesn't sound right if you can only get 16 degrees of advance out of it. Maybe try another timing gun?

Did you check the timing exactly like this article says?
http://www.c-speedracing.com/h...g.php</TD></TR></TABLE>

I have sucessfully done timing on 4 different B-Series engine......and have used 3 different timing light. I am sure the timing marks line up. I am thinking the ECU is doing something funny because i have actually tried using a different distributor which works 100% and it still did the same thing on my car. The only thing that can be retarding my timing is my ECU. I will give that a shot to see if that is it.

And no, i am pretty sure no B-Series uses hydraulic lifters.

 

Yes, if you have an extra ECU try changing that out.

Kind of a dumb question, but have you checked to make sure the check engine light bulb isn't burned out? So you may be throwing a code and just can't see it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WiggiE &raquo;</TD></TR><TR><TD CLASS="quote">Yes, if you have an extra ECU try changing that out.

Kind of a dumb question, but have you checked to make sure the check engine light bulb isn't burned out? So you may be throwing a code and just can't see it.</TD></TR></TABLE>

CEL is working because before i start my car, it will come on when the key is turned to the "position". Actually, last night, we discovered that the IAB is not working either so we did some testing on it. It seems that the sensor is not getting any voltage (should be 12V once the car is on). Next we checked for continuity (spelling) of the wire and it checked out good. We conclude that the ECU is not putting out a signal. It might be the ECU that is doing funny things to me...backfiring, timing, IAB.

 

maybe its the civic fuel pump

 

how are your valve clearances, have you checked them? this can cause backfire if they are wrong too tight or too loose...
oh for the chevy tech of the group... honda motors dont have lifters! they have overhead cams and rocker arms! tech y0

 

I had that problem this weekend. I just got back from a 6month deployment(not fun) and my car was misfiring everynow and then. I checked everything fuel, timing and spark wise. In the end it turned out my rotor wheel in on my distrubitor was bad. That was my experience so check yours it mite be that....

 

also don't forget to jump the diagnostic connector (CEL should be on steady if there are no codes) before checking the timing.

 

Too much fuel. Have you mucked with the fuel regulator at all?
If you have aftermarket fuel regulator switch back to stock.
Check fuel regulator gasket.
Use a stethascope or end of a screwdriver to see if your injectors are all working properly. Pull plugs and check to see if they are fouled.
Too much fuel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 8400RPMS &raquo;</TD></TR><TR><TD CLASS="quote">Too much fuel. Have you mucked with the fuel regulator at all?
If you have aftermarket fuel regulator switch back to stock.
Check fuel regulator gasket.
Use a stethascope or end of a screwdriver to see if your injectors are all working properly. Pull plugs and check to see if they are fouled.
Too much fuel.
</TD></TR></TABLE>

I have already checked the plugs and it does look like i am runnign rich. I have all stock fuel components. (FPR, DX pump, stock injectors)....i think i am going to swap in a ITR fuel pump and check my FPR. Does anyone know if u can use a stock D series FPR on the B series?

 

Not sure but i know that the gsr and type r have a different regulator than non vtec integras and the civic has a totally different regulator.
Well actually its the same regulator but.. where the hose connects its a different shape. Vtec has a bend in it. non-vtec is straight.
Civic is different size.