i just installed a gsr motor in my crx, i am using all non-obd components(like dist, injectors, pr3 ecu ...etc etc) and when i punch on it in 1st gear everything feels good until about 6-7 grand then it bogs nasty,like if i hit the rev limiter but i could still go but it feels like i lost compression bigtime! I hope im making sense, and i hope someone could help me out. The motor is basically stock except s2 im, and exaust. lates
manny

 

maybe fuel? hmmm....

 

its vtec dude

 

what do u mean its vtec?? please explain, because i dont see what vtec has to do with it bogging like that. I know vtec is engaging way before that, and its confirmed with my vafc. please i would like to know why u think its vtec. thanx
manny

 

im just messing around mang.
sorry for the trouble.. i should have just put its neither fuel or spark.

 

maybe yuor fuel pressure is dropping when vtec engages

 

danm i wish i had a fuel pressure gauge( well i did until the glass broke on it) but i will try and put some tape around the gauge so it will hold some of the fluids inside. also what would make the pressure drop so dramatically after vtec hits?? im thinking it has to be related to the distributer or something like that. that **** is weird. well please keep the responses coming.
manny

 

the volumetric efficiency of the engine changes dramatically when you switch over to the bigger cam and it needs a lot more fuel. your stock pump may not be up to the challenge, although I highly doubt it because I've done coutless GSRs, B16s, LSs, and LS/VTECs into 88-91 cars before and never replaced the pump.

 

ok, i see what ur saying. But like u said, its probably not the fuel pump. I took it out for another spin right now, and you know what it really feels like....it feels like if you rev your motor all the way to 8k and just let go off the gas. It doesnt really bog , but more of a deceleration. Thats the only way i can describe it. has anyone had this problom before???? thanx
manny

 

I am very much willing to be that your secondary intake runners are not opening, if you still have them.


[Modified by VaporTrail, 4:42 AM 1/14/2002]

 

And check your oil level.....could be trying to switch the VTEC on and cannot because your oil level is too low.

 

He has a SKunk2 IM, anyways, if anything, they would be staying open with any computer besides a P72, which wouldnt do anything for top end, just hurt midrange.

 

Check ur VAFC and make sure the VTEC solenoid wires are connected properly.


[Modified by SlayANT, 10:17 AM 1/14/2002]

 

thanx alot guys for your responses. I will check my oil level, because that might be the problem. I will also double check my vtec wire, but the vafc says vtec is engaging a 5300rpm.....so i think everything is cool with that. But you guys really think it has to do something with vtec even though the problem happens at 6k. Thanx
manny

 

check your ignition timming

 

i checked my timing, its at 17 degrees. Also now it revs till 7k, then it does not want to rev any higher, it just stays steady at 7k even though i am flooring it. im puzzled, and confused.

 

make sure the injectors are in good working order.
you can use integra injectors, just need to remove the resistor box.

 

It sounds like to me that your problem may be the PR3 non-OBD ECU.....so you probably are hitting the rev-limiter! As far as I know, the V-AFC doesn't adjust your redline (I've never used one), so you are stuck at the PR3's redline/revlimiter...which is probably about 6-7 grand....but I could be wrong...maybe someone else will see this and confirm it for me. Later!

 

I cant believe nobody else has any input on this..............

 

check your distributor rotor and plugs.

 

well the pr3 redlines at 8200 rpms, and i cant beleive no one has had this problem. And as for the dist rotor, i just might bu ya new one. And plugs are good, well my friend came over and just done some small tuning and runs alot better. only prob is it wont pass 7k. ahhhh, i hate this crap. owel, i cant wait till it reaches its full potential. but for the condition it is in, it hauls ****. I hope to get in the 13's with this . oyeah one more thing, i have a code 7 (tps) and that might be the problem also, but the wierd thing is that i checked the tps and it was good. It went from 0 to 4.5 volts......but my wiring harness looks like sht, so that might be the problem too. im talking t much , ill shut up now.lates
manny

 

I had this same problem before where it would bog at like 5800 rpm (very hard to describe the feeling) I was really worried about it, then I chandged my oil and it never happened again. I think I was more than a quart low.

 

huh, thats funny. Well i didnt even have oil in my car, because i didnt have a dipstick for the gsr put some oil in their and it feels better. I also had a stock exhaust from the axle back,(damn tickets) i changed that out and it feels a hell of alot more free flowing. As for the tps sensor, i checked the volts and it had 4.5 at WOT, WTF???? i guess its in my wiring harness being all hacked up. ill need to go to the junk yard and find one, hopefully that clears the code7. on to another subject, i got a tps sensor off a 88 civic 4 door, and its not the same as the tps on my car. It wont work......when i put the tps on the butterfly wont open all the way. The tps sensor insides stops it from doing so. Now i was under the impression that ll honda tps sensor where the same. Am i wrong or what??
thanx
manny

 

just another thought on the VAFC. just because it says its engaging doesnt mean it is. it will show on the screen its engaging but doesnt necessarily mean it actually is (if that makes sense) unless of course u can hear it.

 

you mentioned that you have a cel on. fix that cel and try it again. your car is running in safe mode due to the cel light being on