idle problem after supercharger installation

[JvR]

Dear Camry drivers,

I have got een (big) problem.......
I have just installed the supercharger on my 1998 camry v6 automatic.

When i start the engine, it runs nice but the idle speed is 1400 RPM.
When the engine is hot it runs idle 2000 RPM.

So the car is not driveable.
I have not installed the one-way valve , i hope that is the problem.(i am going to buy one tomorrow) When i flatten the hose on the position of the one-way valve the rpm drops to 1100 rpm.

Has someone an idea??????






THANKS!
(sorry for my bad english.....i'am from holland)

[dc_98_cam]

.... no expert on this subject.
Just want to know which valve are you calling the one way valve?
Is this possibly the anti-surge or dump valve? ... or something else?

[JvR]

Thanks for your fast reaction!

This is the one:
http://www.ttora.com/forum/showthread.php?t=22551

[dc_98_cam]

What about some sort of problem with the IAC, the idle air control valve? This is what is supposed to control the idle engine RPM during start up, and then decrease to 700 or so. Repair manual description is a rotary solenoid. Could it be stuck? Is everything making good electrical contact? Is the hose/tube connected with no obvious leaks?

[JvR]

you are fast!

yes it must something like that.

Correct me if i'm wrong:
When the intake valve (accelerator) is close, the iac valve will bypass the intake with a hose. (IAC controlle the rpm to about 700 rpm)
Normaly this is in vacum condition, now with the supercharger not, so the air goes with higher rpm back to the iac. (the pressure is higher in the mainfold) Then the one-way valve must kick in. this can be the problem

but

The strange thing is :when the car is runing idle and i flatten the iac hose,i think the car wil stall.But no, it runs 1100 rpm..... i think er must be a leak.....but where ????
It think after the intake valve or the hose of the iac valve.

What do you think??


I hope you understand me....my english not so good.

[dc_98_cam]

Trying to decide if something is wrong with the IAC Valve, or something is wrong due to the supercharger pressure and aforementioned check valve.

See link below for better description of IAC ... refer to p. 336. operation:http://www.camrymanuals.com/download...iagnostics.pdf

If not too difficult, you might consider checking the electrical continuity between the three pins of the IAC valve, as indicated in the wiring diagram at the bottom of the page.

Also, if you have a scanner tool, you might check to see if any engine error codes have been flagged.

The diagnostic section suggests problems with the AC, and ECU .... but this sounds unlikely.

Something that would be relatively easy to check would be the EFI relay. Sometimes relays malfunction. Do you have a salvage yard that you could obtain a spare EFI relay from .... just to check if that is in fact the problem?


The link above does not always work .... could be a server problem. The primary link is:
http://www.camrymanuals.com/index.ph...=107&topicid=0
Go to Gen 4 section, and then to Diagnostic link. Do a file download and save.

[JvR]

Thanks !
I hope this week i get the one-way valve, then i try your sugestions.

[JvR]

Tonight i have installed the valve!
Also i found an egr gasket was leaking (i don't know it is the right word)

The engine is now run 950 rpm with a 6psi pulley....i don't know its normal???

[Venom_5]

thats normal .... a stock camry idles around 800 with the a/c off

[JvR]

Today the engine starts add 1400 RPM.
I put the autom. in drive. I run 40 meters and park the car. I put the autom. in Neutral the rpm shoots to 2000 rpm. switch on the a/c no diffrents, switch severaltimes to Drive and Neutral. The cars idle hold 2000 RPM.

I shutdown the engine, 5 minutes later i start the engine. Now the car won't run idle anymore, i must hold my food on the gaspedal. (the engine sounds normal)


I have looked under the hood and i think i have seen a crack in the aic.
(maybe i have kill it with installing the supercharger.........so many maybe's......)
I hope that this week i can measure the AIC ....i hope it is not expansive.


Toyota garage is not helping me at all........TRD never heard of it......supercharger on a Camry????..........the supercharger is causing this problems.......
(TTE =TRD in europe. Toyota sells these TTE superchargers for different cars ...of course not for a Camry.....)

It drives me crazy

[dc_98_cam]

... Not sure if this will help. ... Sometimes, if you think there is a gasket or an air/vacuum leak in the intake manifold someplace, you can get a can of starting ether, and cautiously spray around the gaskets or other possible leak sources. You have to be kind of careful, because starting spray is very flammable .... do you have a fire extinguisher?
.... If there is a gasket leak or a crack someplace, you will hear or notice a change in the engine RPMs as you spray that particular area.

.... be careful.

[Eye8Pussies]

if your iac is actually broken and it's the only problem, it should still be able to idle at least a bit though...usually....since the throttle plate never actually fully closes. I would say that the cause is something else.

it does sound like it could be a massive vacuum leak

do what dc_98_cam says and use a fuel injector cleaner to spray around and see where there is a vacuum leak.

then to narrow it down, you can use a propane torch (without lighting it- just turn the gas on and wave it around the affected area)

[bigbird]

Originally Posted by Eye8Pussies

you can use a propane torch (without lighting it- just turn the gas on and wave it around the affected area)

wow that sounds like a good idea

[Eye8Pussies]

^ you'd be surprised...

everybody *thinks* that it's a bad idea....but it works and is safe. I use it all the time (when I had vacuum leaks).

propane- when exposed to a spark, ignites readily. BUT it would take more heat than an engine can create outside of the combustion chamber to ignite it. So unless you have a loose sparkplug wire or a live spark in your engine bay (probably best to keep it away from the cap- which my car has none of), it's not a problem.

[Venom_5]

whats the purpose of the propane other than to make everyone around you fear for their lives?