Pulled the head off and replaced the head gasket and now the car idles high. Tryed everything and it still is high. Did a search but no help. When i rev the car idle gos to normal and jumps back up to 2000 to 1500 rpm. checked for vacume leaks but nothing. What cold it be?

 

Sounds like you forgot or put in a vacumm line in wrong. Did you check all the conections to your throttle body/intake manifold? Check your IAC valve.

 

vac lines....... one is likely off or almost off....... probably as smaller one also, when a big one pops off, your car magically revs itself....... the FPR doesn't know wtf to do

 

i agree, has to be a vacuum line somewhere

 

check your connections on the fast idle thermo valve and idle air control valve... they usally will cause a surge when faulty but they do control the idle speed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ViZ &raquo;</TD></TR><TR><TD CLASS="quote">check your connections on the fast idle thermo valve and idle air control valve... they usally will cause a surge when faulty but they do control the idle speed</TD></TR></TABLE>
Where are these located at? No it is not a vacume line cause I dont have any lines running vacume off the intake manifold. All the ports have been by passed. By the way can a injector resistor box cause this by chance?

 

what do you mean all ports has been bypassed, what exactly is creating vaccum then, the fpr needs a source to opperate, so do the secondaries unless they are removed.

I think we need some more info about your setup

 

Took the secondaries out and the only ports left are the ones on the throtel body one for the fuel presure regulator and one for the brake booster. Did I add my prelude is in a hatch not in a prelude.

 

check any of the hoses for slits or cuts. get some carb cleaner and spray it around all the lines, if the idles surges up or down there is a leak some where. Also, make sure that the IAC is hooked up correctly, and that there is no air in the coolant system as the IAC is thermostatcally controlled. Also make sure the idle jet hasn't been messed with and that the stop on the throttle plate has not been cranked up. All these things can cause idle issues

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93ludeSi &raquo;</TD></TR><TR><TD CLASS="quote">check any of the hoses for slits or cuts. get some carb cleaner and spray it around all the lines, if the idles surges up or down there is a leak some where. Also, make sure that the IAC is hooked up correctly, and that there is no air in the coolant system as the IAC is thermostatcally controlled. Also make sure the idle jet hasn't been messed with and that the stop on the throttle plate has not been cranked up. All these things can cause idle issues</TD></TR></TABLE>

Well the t-body came off a running car and that car was running fine and I have not tuched anything on it. Sprayed carb cleaner all over the place but no funny idleing. The iac is on the front of the manifold correct? As for air in the coolant syatem not sure but I can fix that by opening the niple on the thermostat hoseing and bleeding it out correct?

 

the fast idle thermo valve is on the bottom side of the throttle body and the idle air control valve is on the front of the intake manifold by the fuel rail

 

are these stock h22 cams?

 

Yes the cams are stock. No engine lights until I unplug sensors and the idle starts to surg. What do I do to get the air out of the coolent?

 

open the bleeder near the thermo and start the car to push all the air out

 

Do I open it and let the car run for a while or just start it and then close the bleder

 

open it and let the car run to push the air out, seriously get a helms manual or something if you are not sure what to do

 

Its not that I dont know how to do it its just soemthing that has never happen befor.

 

sell the car and buy a V8 like Paul Walker did

 

Coolant pressure would have nothing to do with idle, the car would overheat also.......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spoolinlude &raquo;</TD></TR><TR><TD CLASS="quote">Coolant pressure would have nothing to do with idle, the car would overheat also....... </TD></TR></TABLE>

no but coolant temp will

 

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