Problems after re-build please help
 

OK i just rebiuld my LS motor, New piston,rings all new seals and gaskets. Well i put the motor in over the weekend and it wouldn't start. I finally got it to start but i have to keep pumping the gas to keep it running. If i let the gas go it stalls and if i hold the gas steady it stalls. I checked the compression and it was 120 psi in all 4. Normal is 180 - 210. but i think this is becasue the rings haven't seated yet. Can anyone give me ideas on what to check. Now i'm not sure but i might have put the head gasket on upside down. Could this cause my proble if it is on upside down? Please give me and ideas you have so i can start checking ASAP

Re: Problems after re-build please help
 

timing belt.

Re: Problems after re-build please help
 

what aboout the timing belt. Cam timing is 100% correct.

Re: Problems after re-build please help
 

codes?

Re: Problems after re-build please help
 

nope no codes at all. I'm still runing OBD2a just as an FYI.

Re: Problems after re-build please help
 

If your compression is even in all cylinders, it's not ring seating. You need to give more information- what size of everything did you use? How was it bored/honed if at all? What specification did you use for valve lash? Did you remember to hook up your MAP sensor? Also- was your compression check done with the throttle wide open? If you put the gasket on upside down it would have blown up by now. It would still have compression, but your cams would have seized if you ran it for over about 45 seconds. And you know your cam timing is right, and it is, so don't worry, but go make sure your cam timing is right! There is a guy at my work who does nothing but install timing belts and chains on engines, roughly 45 a day, and even he fucks it up sometimes.

Re: Problems after re-build please help
 

I bet the cam timing is off

Re: Problems after re-build please help
 

yep. and dont say its not the timing. because.... its the timing

Re: Problems after re-build please help
 

Check all of the above. I think you might be a tooth off on your timing belt. Have you tried adjusting the big screw on top of the throttle body?

You also should check to see if the IACV ports in throttle body are plugged up. I had both problems when I did my B20 swap. The idle air ports were clogged and the TB screw was out so far the car would idle at 2000 rpms.

It could just be the IACV got whacked when you were installing the motor. It's easy to do.

Re: Problems after re-build please help
 

Well i set the valve leash yesterday .04" on the intake and .07" on the exhaust side. Car idles at like 100 rpms? And i can hear some slapping around. I'm not sure if it's in the head, so i'm going to re-set the leash again today and see what happends. i'm goign to do the t-belt again while i'm at it. I know wthe timing is fine but can never be to sure. i'm so gettting sick of this ---- already. anyone want to buy a ek 4dr with a b18b1 with a turbo kit?

Re: Problems after re-build please help
 

any thoughts?

Re: Problems after re-build please help
 

slapping could be pistons hitting valves = timing off. ;) 180* out maybe?

set it w/ #1 TDC COMPRESSION stroke (rotor in cap will point @ #1 spark plug wire at the top of the Compression stroke)

Re: Problems after re-build please help
 

couldn't be 180 out on the cam. the fucker wouldn't turn over, let alone run!

Re: Problems after re-build please help
 

yeah and there would be a loud ass bang everytime the sparkplug fired. still sounds like the timing belt is off. make sure the cam gears are on right and all that good ----.

Re: Problems after re-build please help
 

well like i said i'll check the timing and clearance again tonight when i get home. I'm pretty sure everything is in spec though. If it's not the timing or the leash what else could it be?

Re: Problems after re-build please help
 

All this drama and I still havent heard anyone say the word BEARINGS yet.

Re: Problems after re-build please help
 

because the bearing wouldn't have anything to do with the car idling.

Re: Problems after re-build please help
 

So last night i get home and take the valve cover off. What do i notice as soon as i get the cover off. A rocker arm on the exhaust side on # 2 popped out. Well i guess that was the slapping sound, So i fixxed and re did the valve leash and re did the timing belt. So the car will start but i have to have my foot on the gas ever so lightley. If i let off the gas the car still drops to like 200 rpms and just stummbles there and stays running. Another thing i noticed is that it's pulling like 20hg in vacuum? isn't this really deep? If anyone has any sugestions please let me know what else i should check? Or if anyone can sugest a place in New jersey that builds honda motors let me know. It might be time to take it to a pro.

Re: Problems after re-build please help
 

realy realy closed throttle + fresh motor = high vaccume = low idol rpm = need to adjust your idol

Re: Problems after re-build please help
 

so you think i just need to turn the idel up?

Re: Problems after re-build please help
 

yup.. losen that idle screw on the TB

-20 @ idle is normal.

Re: Problems after re-build please help
 

20 hg at vaccuum is good

Re: Problems after re-build please help
 

ok well when i get home i'll try it out and see what happens. Hoping to be able to drive it in the morning.