Weber 32/36, Low Idle no matter what I do.

[JadeEstevez]

I had trouble with my car almost stalling when coming to a stop and then picking it's revs back up. I recently got new jets to fix the low idle problem I was having, and basically they havn't fixed it, they just made the idle more steady... By steady I mean the car doesn't almost stall when coming to a stop, the idle just drops to about 300-400 RPM and stays there. Now, no matter what I do with the Idle adjustment screw, the RPM won't get higher, It only makes a difference once the adjustment screw starts opening the throttle a little and I don't want that! The mixture screw is at 2 and a half turns out, and I've read thats good and leave it at that.

I have a 60 idle jet in the primary and a 50 in the secondary at the moment, I also have a 55 and another 60, but if I up the secondary from 50 at all, the idle doesn't get any higher but the cars idle smells really rich?

I'm very confused, so any help would be very appreciated =) Cheers!

[ToyTA22]

You will have to turn idle speed screw in i.e open throttle slightly. That is only way you will get even idle and smoother deceleration.
Mixture controls a major part of idle system but idle speed is fine tuned by idle speed screw.

[Token]

If its dropping revs when your coming to a stop I'd be checking for vacuum leaks around the carby/intake manifold. Also, the idle adjustment screw is there to adjust the speed of the idle, its meant to open the throttle slightly, thats how it works.

[JadeEstevez]

No, I fixed the dropping revs issue, It was due to the throttle being open slightly and also caused the unstable idle and back crackling. It runs great now, just want my Idle higher but can't do it without the throttle opening >___> I'm stumped!

Unfortunately your answers didn't help, Thanks though guys =P I should be mroe clear next time, sorry.

[JadeEstevez]

I read somewhere that if you have to turn the Idle adjustment screw in to the point where the throttle opens, then your jets are too small. I also read that the mixture adjustment screw is normally set somewhere between 1.5 to 2.5 turns, any less and your jets are to big, and more and your jets are too small.

[Dazza]

You need to adjust your idle speed screw that opens the primary throttle buttterfly. Your unstable idle would have been caused by the secondary throttle blade being held slightly open. The secondary throttle blade has its adjustment screw under the carby and should not be touched to adjust idle speed.

[JadeEstevez]

It's okay I fixed this =P Sorry, should have updated here.

Doesn't matter now anyways, cars dead, have to rebuild AGAIN! Tooth broke off and jammed up the chain:

"The chain is jammed in this position =P Looks funky hehe.




The chewed up timing cover, Lucky I have spares.




Missing tooth.

"

[Silly Rabbit]

Geez that must have made a helluva lot of noise and chaos when that went like that........gotta love simple motors like the 18R to fix easily enough!

[JadeEstevez]

Actually, it made bugger all noise XD just a little pop and then the sound of driving over stones and flicking them up under the car from the pieces of timing cover... I pulled over right away to avoid as much damage as possible.

Should only take a day or two to fix once I have all the parts ordered in. It sucks though, I don't have a car to pick the parts up, or the money at the moment. I'll manage =)

[Rens]

Gee, wasn't that long ago that you were talking about modifying an engine that ran a timing belt because you thought chains were better.

[JadeEstevez]

Hey, I now retract that statement ;P Atleast if a belt does go, it won't rip apart the timing cover!

Hmmm.... I'll look into a BEAMS eventually now. This has changed my perspective on certain engines.

[allencr]

The tooth is more likely a result rather then the cause.

[JadeEstevez]

Yeah I know, Hence why I'm pissed off! It wasn't an old chain! Only 11,000kms on it when it went.

[ToyTA22]

I learnt the same way you have. If you change to new chain use new sprockets/gears as well, the gears wear more than chain does.
The chain can jam in worn sprockets/gears
If you need another timing cover I have a spare. PM me if you need. I don't want big dollars for it.

[JadeEstevez]

Nah I have 3 spare timing covers =P Thanks for the offer though. I'm taking the sump off today to clean out all the bits of chain and timing cover, Also removing the Aux cam and bearings as there is half of key way stuck in it. Again I have a spare Aux cam =D

Where do I get new sprockets from though? I thought you couldn't buy them new?