White97Teg

When I start my car the engine will start like normal and instead of revving down it continues to rev all the way to redline if I let it. What could be the problem???

mikecel79

Is your throttle stuck open?

White97Teg

I dont think so because the throttle linkage is in the usual place...also I noticed that the overflow tank is at Max.

mikecel79

I would pull your intake tube off and look at the butterfly. If it's straight up and down the throttle is closed like it should be. If it's horizontal then it's open. That's the only thing I could think of that would let your engine rev to the redline after you start it.

White97Teg

Checked the throttle and its normal. Anyone else?

vteg

Did you check your throttle cable? It may be too tight. Did you do any maintenance, or anything before this started to happen?

Also you state that it will go to redline if you let it... How do you stop it?

Isaac

It's normal, don't worry about it. It's just your car warming up super fast so you can race asap! (J/K) Check all cables, etc.......

kkim

what modifications have you done to the car?

White97Teg

As for performance mods I have AEM CAI, DC 4-1, Apex-I N1, Exedy clutch, 50 shot Zex Kit

PatrickGSR94

iTrader: (1)

So you're saying the engine will go all the way to redline w/o you even touching the gas pedal? There is no way that can happen if the throttle plate is closed. Something is either holding it open or causing it to open after you start the car.

kkim

and when did this problem start? after you made one of those mods or on it's own? let me put it another way, what was the last mod you did before this started happening?

dubster99

The only way that can happen is if the throttle plate is open

White97Teg

The Zex Kit was my last mod. Would a broken or disconnected vacuum line cause the throttle body to open????

White97Teg

The problem actually started after I first time I sprayed in first gear. But I didnt over rev or anything like that, it just lost traction until redline and then I shut the nitrous off.

kkim

there is a return spring which keeps the throttle closed. is that still in place? if you open the throttle plate by hand, does it snap back shut on it's own after you release it?

dubster99

I sprayed plenty of times in first gear and I have never had that problem. Like kkim said, take off your intake and check to make sure the throttle plate operates correctly, that's where your problem lies.

White97Teg

Yes it springs back into place.

dubster99

Take off your intake and start the car while it's cold, take a look at that throttle plate and see what is going on. Are you positive the throttle cable isn't too tight? Try loosening it a tad and see if that helps.

White97Teg

I will try that. Also what would cause the throttle cable to become tighter, how did it just start to do this?

kkim

that would be my advice at this point, too. let us know what's happening.

dubster99

I just talked to my honda god roomate, he said that also a broken/disconnected vaccuum line can cause an erratic idle like that. Check all the hoses and make sure they have NO holes in them, because even the smallest hole can cause that problem.

kkim

erratic idle, yes. but I've never heard of the engine going up to redline due to a bad vacuum line.

dubster99

Apparently he had a similar problem and when I described the idle going to redline he said that was exactly what happened to him, and the culprit was a vacuum hose.

kkim

great. ask him if he remembers which hose it might be and this might solve this guys problem.

White97Teg

Thanks for the help guys..It is late now so I will check it out tomorrow and Ill let you guys know.