i have a newly rebuilt gsr motor and i think i messed up the timing. also, when it starts and runs, when i step on the gas, it almost stalls and like coughs air out of the intake. is it possible that i bent an intake valve by running the car with the incorrect timing??

 

bump... please help...

 

backfiring through the intake is USUALLY a sign of misfiring. intake valve is opening on exhaust stroke or compression stroke. double check your timing.

yes it could be possible a valve could be bent. how bad, i'm not sure.

what i would do is get your timing back to spec and perform a compression and leakdown (if you have shop air) tests. that should determine if you damaged your valvetrain and what cyl. if so is damaged.

 

i did out the timing back to spec. and it actually ran a little bit better after but it still coughs back through the intake when you hit the gas. also, can you do a leakdown test with the head on the car???

 

A leakdown test requires that the head is still on the car.

http://www.c-speedracing.com/howto.php

You can try the compression test as well. Have you adjusted your valves? If they are too tight (not fully closing), it could cause your symptoms.

 

might be spark plug order

 

ok i did a compression test and these are the results....

cyl 1 - 0 psi actually it was less than 10
cyl 2 - 210 psi
cyl 3 - 190 psi
cyl 4 - 200 psi

is there a way to test and see if there is a valve stuk open???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RoB316 &raquo;</TD></TR><TR><TD CLASS="quote">ok i did a compression test and these are the results....

cyl 1 - 0 psi actually it was less than 10
cyl 2 - 210 psi
cyl 3 - 190 psi
cyl 4 - 200 psi

is there a way to test and see if there is a valve stuk open???</TD></TR></TABLE>

Try adjusting your valves. Cylinder 1 may be adjusted too tightly, which would cause the valve(s) to remain open.

 

how do you do a valve adjustment???

 

team-integra has a valve adjustment article. or you can take it to the dealership for $100

 

cool ill do that and let you guys know how it turns out thanks guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RoB316 &raquo;</TD></TR><TR><TD CLASS="quote">how do you do a valve adjustment???</TD></TR></TABLE>

http://www.c-speedracing.com/h...t.php

A tool like this helps immensely with a B-series VTEC head.


http://www.amazon.com/Alltrade...r=8-2