Help my car idles too high

69stanger · Aug 8, 2004

I just removed my heater from my car since it was cracked and leaking coolant. I will put it back when I have the funds to get a new unit.

anyways back to the problem, after I removed the heater I restarted up my car and now it idles at 1800-200rpm and it wont come back down to 800-1000 rpm like before. I have not touched the idle screw on my carb or touched the timing so why is it idling so high

could a vaccum leak be causing this?

any help would be grealty appreciated.

-Al

69stanger · Aug 8, 2004

I fixed the problem

can the admin delete this thread

thanks

crushnut · Aug 8, 2004

69stanger said:
I fixed the problem

can the admin delete this thread

thanks

What was the problem?

69stanger · Aug 8, 2004

vaccum leak

Ozsum2 · Aug 8, 2004

Never heard of a vac leak making an engine idle higher.

BoostedmaxPSI · Aug 8, 2004

Ozsum2 said:
Never heard of a vac leak making an engine idle higher.

This should always be the first thing to look for.

Good troubleshooting!

Ozsum2 · Aug 8, 2004

BoostedmaxPSI said:
This should always be the first thing to look for.

Good troubleshooting!

Why, usually when you have a leak, the rpm falls and you have a miss.

Ozsum2 · Aug 8, 2004

Ok,.....................can anyone else explain why???????????????????

BoostedmaxPSI · Aug 8, 2004

Give it a try, pull a line from your intake manifold/carb and see what happens. You'll suck in air and start to advance timing.

Ozsum2 · Aug 8, 2004

BoostedmaxPSI said:
Give it a try, pull a line from your intake manifold/carb and see what happens. You'll suck in air and start to advance timing.

First, I am no nube. Second, everytime I hook up my vac gauge, the car stumbles and just about dies. Far from speeding up the rpm.

Ozsum2 · Aug 8, 2004

I don't believe having a vac leak advances the timing. It would create a lean mix, just like you would do if you screwed in the idle mix screws too much and the rpm drops.

BoostedmaxPSI · Aug 8, 2004

Ozsum2 said:
First, I am no nube. Second, everytime I hook up my vac gauge, the car stumbles and just about dies. Far from speeding up the rpm.

I just check my last posts and didn't see anything about you being a "nube". Just offering up some advice. I just went to my garage and grabbed a Haynes manual to confirm what I just said. My post was referring to the intake manifold vacuum.

Ozsum2 · Aug 8, 2004

BoostedmaxPSI said:
I just check my last posts and didn't see anything about you being a "nube". Just offering up some advice. I just went to my garage and grabbed a Haynes manual to confirm what I just said. My post was referring to the intake manifold vacuum.

Think about my reasoning. I just wanted you to know that I am a former 5000+ poster here on SN.

Ozsum2 · Aug 8, 2004

When I pull of my vac hose from the "tree", it comes off the intake manifold.

Jonstantine · Aug 8, 2004

when i pull a vacuum line off my carb the idle goes up on mine too (on my new demon)

BoostedmaxPSI · Aug 8, 2004

Jonstantine said:
when i pull a vacuum line off my carb the idle goes up on mine too (on my new demon)

That's because we have less then 5000 posts.

Ozsum2 · Aug 8, 2004

Jonstantine said:
when i pull a vacuum line off my carb the idle goes up on mine too (on my new demon)

Mine is an Autolite 2100. When I proposly make a leak, it bucks like a mule, and damn near dies untill I get the gauge on.

BoostedmaxPSI · Aug 8, 2004

I just went thru this same issue and found a hole in a cap from the vacuum "T" on the back side of the intake manifold. Replaced the cap with a new one and my RPM's dropped back down to normal. This was on my '68 stang with a 289 and C4.

Ozsum2 · Aug 8, 2004

Jonstantine said:
when i pull a vacuum line off my carb the idle goes up on mine too (on my new demon)

Most Demons run a tad rich, so you may actually be helping the situation by the leanness of the vac leak.

Ozsum2 · Aug 8, 2004

BoostedmaxPSI said:
That's because we have less then 5000 posts.

Maybe you should have said "I" instead of "we"!

Help my car idles too high

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