Printable Version of Topic

Posted by: shaggy May 16 2007, 09:46 PM

so now it starts.

the timing is right(27-28BTDC at 3500rpm)
the fuel pressure is right 30-32ish.
the idle mixture is all the way lean.

what we did was start it. time it set FP and then it was idling way way too low 400 or so.

at the point it was hot oil temps of about 180-190

i came in for a break and to regroup to decide what i would do to tackle the low idle problem.

i go back out. remove the FP gauge.

and start it.

it revs to 5K and settles at 4200.

i then check all vaccume lines(all good).
then try again. same deal as before.

i then turn the screw on the FP regulator CCW(lower pressure right?).

then try again.
same thing. no effect.

now im here.

any ideas?

i am a 2056 with a tuned MPS for the RAT 9550 8.5:1 compression.
nothing too special.

please please help!
this is about 15 months of work.
and i hope to have it running for my girlfriend's graduation on saturday.

please help me run down this problem!!
-jim

Posted by: toon1 May 16 2007, 10:15 PM

classic vac. leak symptoms, sounds like it might be heat related.

check the AAR, make sure it closes.

Check the PCV connection

Check the air intake runner/head junction these will leak with the thin gasket on the phenolic block.do not over tighten the air runner bolts, the torque is 4.6lbs, ask me how I know

Check the TB. Hell!! check everything at least twice you 'd be suprised at what you can miss when frustration sets in

get a can of carb cleaner and spray on the juctions of all vac fittings. It's flammable be careful

Keith

Posted by: shaggy May 16 2007, 10:18 PM

how do i check the aar?

what about the rev to 5 and then settle at 4200 is that a classic vac?

Posted by: BahnBrenner914 May 16 2007, 10:56 PM

I know I accidentally left a vacuum hose off and it idled at about 4000 like you talk about, if not I guess you're in the same boat as me with my 914... screwed.

Posted by: toon1 May 17 2007, 09:27 AM

Niether one of you guy's are screwed! take a deep breath and pay close attention to everything on the motor

914's are an auto in it's simplest form. If you have gotten this far with a restore, don't throw your hands up and say your screwed, your not.

What you are is frustrated, understandable.

What checks have you done since yesterday? At what engine temps?

Let's start there first before we get into the AAR (auxiliary air valve)