i got an ls/vtec, the timing is fine, new cap, rotor, plugs, wires, idles perfect....

however, when there is any throttle opened at all, the motor bogs, it kind of jumps, like its either being flooded or choked, but totally loses power and wont rev past like 2k....

i've played with the cam gear timing and ignition timing, no difference....brand new IM gasket, i don't hear any leaks in it.....and can't check for CEL's cause my instrument panel is fucked up.....

but anyway, the intake filter squeaks when the throttle is opened, but thats about the only noise i hear.....the tps voltage has been checked and is ok....could it be MAS problem or....?

thanks.

 

bump

 

no thoughts??

 

did you check the ignition timing the correct way?..

try checking your fuel pressure

 

**** no....the head was milled .035, and the intake cam was advanced 3 degrees to compensate for that....that would mean the dizzy would have to be retarded 3 degrees to 13....right??

and how do i check my fuel pressure without an adjustable fpr??

thanks.

 

sounds like lack of fuel to me

 

its got stock fuel system....rail, fpr, pump, injectors, chipped p28 ecu.....compression is right around 12.5:1.......its blowing blue smoke from the exhaust, thats rich right??

i yet again, have no idea really....

 

i got the same problem except in my da with a b20vtec and it just ended up being that my timing was a little off, but i also got a straight pipe put in which seemed to help the situation because of the bogging happening i thought it was either fuel or my cat was clogged again. Straight pipe did help out alot though

 

Bump for the same problem!

I have the same problem as this guy. I got my car stolen, and can't figure out what the ******* did who stole it, but he fucked up a lot of things; I have a SOHC ZC (Vtec). I was leaning towards the O2 sensor that was disconnected, but a lot of shops have told me that a disconnected O2 sensor would not be that detramental to the engine running. I know the motor is running way too rich because my exhause reaks of gas and the fuel pressure reads about 30psi, which is what it ran at before. The motor bogs badly, it will not rev past 3k and tops out at 60 mph. I changed the ECU (p28, p29, and p30 spoon), but none of them relieve the problem. PLZ Help!

 

any thzoughts??

 

Same problem...I have a 93 Civic EX coupe with b16 ls vtec and if you give it any throttle at all the car dies out...changed map sensors, checked air lines, injectors, everything and cant figure it out...

 

check your timing mark on the cam and crank make sure the engine timing is correct.if thats not the problem check your fuel pressure regulator.also do a compression check to make sure none of your valves are bent.or leak down test

 

the timing on the belt was done out of the car so i'm 100% sure thats fine....the exhaust is running rich, so im pretty sure its not a lack of fuel problem, and the rings are all brand new and are in the "break-in" process, so i guess those are out of the way fa sho.....

i had the ignition timing advanced a lil too far i think for .040 mill, and i've seen a lot of people with ls/vtecs and milled heads advancing the exhaust cam, rather than retarding it, so im gonna play with those and see what happens for now...

anybody else find anything??

thanks for the input fellas...

 

i had the same problem with my crx with a b16a in it, and turned out that my fuel pump was bad. I was getting correct fuel pressure but not enough volume was being flowed. I could rev it to 2k and than any throttle after that it bogged real bad, and you hear all this noise from the intake. I put a new fuel pump in, and fixed it. so get a fuel gauge first check that, also my car would give me trouble starting it would take a couple tries some times.

 

im pretty sure the fuel pumps ok, i mean the problem occurs right after the throttle is opened AT ALL....like step on the gas, immediate bog.....

the timings ok, i mean it idles fine i think.....the dizzy timing was retarded back to 13, to compensate for the intake cam being advanced 3.5....exhaust was also brought to 3.5 (so +0.5, +0.5 cause of the mill).

other than that, i have no idea what it could be....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ewing86 &raquo;</TD></TR><TR><TD CLASS="quote">i had the same problem with my crx with a b16a in it, and turned out that my fuel pump was bad. I was getting correct fuel pressure but not enough volume was being flowed. I could rev it to 2k and than any throttle after that it bogged real bad, and you hear all this noise from the intake. I put a new fuel pump in, and fixed it. so get a fuel gauge first check that, also my car would give me trouble starting it would take a couple tries some times.</TD></TR></TABLE>did you put it in or did i put it in. hay Jason how things car running better now?

 

bump bump.....

 

make sure your t/b sensor connector and map sensor connector (both 3p connectors) aren't mixed up. I did that when swaping my motor and what you are discribing sounds like the same issues i had for about 5 minutes before i figured it out.

And i though blue smoke from the exhaust was oil burning, but i could be wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboxsi &raquo;</TD></TR><TR><TD CLASS="quote">make sure your t/b sensor connector and map sensor connector (both 3p connectors) aren't mixed up. I did that when swaping my motor and what you are discribing sounds like the same issues i had for about 5 minutes before i figured it out. </TD></TR></TABLE>

That is what was wrond with my buddy ls/vtec. Its always something stupid

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheYellowDart &raquo;</TD></TR><TR><TD CLASS="quote">

Its always something stupid</TD></TR></TABLE>

Yeah then you feel stupid for not figuring it out.

 

I tried that too, same problem, before I did the swap the motor ran fine in the other car, and my motor in my car ran fine, all the plugs hooked up alike I believe, but any throttle at all and it bogs out... ? anyone have any other ideas, thanks for the help soo far

 

sounds electrical, I would just start with honda helms and go through the diagnostics.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboxsi &raquo;</TD></TR><TR><TD CLASS="quote">make sure your t/b sensor connector and map sensor connector (both 3p connectors) aren't mixed up. I did that when swaping my motor and what you are discribing sounds like the same issues i had for about 5 minutes before i figured it out.

And i though blue smoke from the exhaust was oil burning, but i could be wrong. </TD></TR></TABLE>

haha, i did that same ****, glad to hear I'm not the only mongo out there

 

wierd....i tried unplugging the MAS just for ***** n giggles and the motor dropped in revs. but still had a constant idle....ill try switching them up tho and see what happens.....

 

til then feel free to keep dropping lines so the del slo can get this show on the rzoad...