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Car smells rich on idle.

Posted: Tue Jul 21, 2020 8:57 pm
by Allan mcl
Hi all,
On tick over car smells rich but runs fine plugs look good colour after a run.1600 on a weber 32/36 any ideas.
Thanks in advance.

Re: Car smells rich on idle.

Posted: Tue Jul 21, 2020 10:13 pm
by D366Y
Not sure what you've had a look at already but this link may help?

viewtopic.php?t=45173

Re: Car smells rich on idle.

Posted: Tue Jul 21, 2020 11:34 pm
by Mc Tool
Sounds like the float has fuel in it . Plastic ones do it , I bought a brass float coz at least its repairable . I high float level can be seen sometimes , mine was flooding so bad that at idle I could see fuel in the main air correctors while idling. I only twigged coz while dissassembling carb the plastic float just seemed to heavy. Engine started real good from cold and real bad from hot ( black smoke ) but it ran ok and didnt eat fuel

Re: Car smells rich on idle.

Posted: Wed Jul 22, 2020 8:54 pm
by pbar
Allan mcl wrote:
Tue Jul 21, 2020 8:57 pm
On tick over car smells rich
Do you know what the CO figure was on the last MOT? Sometimes they give you the printout sheet. It is obviously within tolerance or you wouldn't have passed, but will be interesting to know if it's on the high side.

Re: Car smells rich on idle.

Posted: Thu Jul 23, 2020 10:14 am
by Bug
Wish I could work out how to be both idle and rich at the same time :xd:

Re: Car smells rich on idle.

Posted: Thu Jul 23, 2020 11:25 am
by Allan mcl
If I remember correctly it was 1.9

Re: Car smells rich on idle.

Posted: Thu Jul 23, 2020 4:19 pm
by pbar
I think the spec. is 1.5% plus or minus 0.05, so you are a little high. Might be worth turning in the mixture screw a quarter of a turn and see how life is then. Don't know if it will make much difference to your issue but I always think it's best to have as much as you can correct.

Re: Car smells rich on idle.

Posted: Fri Jul 24, 2020 10:31 am
by Bug
Is the 32/36 still jetted for a 2.0 engine?

Re: Car smells rich on idle.

Posted: Fri Jul 24, 2020 3:55 pm
by Allan mcl
I haven't changed the jets myself so I think so.

Re: Car smells rich on idle.

Posted: Sat Jul 25, 2020 3:48 pm
by 340truck
Bug wrote:
Fri Jul 24, 2020 10:31 am
Is the 32/36 still jetted for a 2.0 engine?
Are we gonna debate this again? We'll have to do "back pressure" next.

Re: Car smells rich on idle.

Posted: Sat Jul 25, 2020 3:53 pm
by Peter-S
340truck wrote:
Sat Jul 25, 2020 3:48 pm
We'll have to do "back pressure" next.
Not without Rich, that was his speciality :lol:

Re: Car smells rich on idle.

Posted: Wed Jul 29, 2020 7:18 pm
by Allan mcl
Could anyone tell me what the correct size idle jets I would need for weber 32/36 for a 1600, I believe mine is still jetted for 2.0l tried to turn mixture screw down but doesn't run wright.
Thanks in advance.

Re: Car smells rich on idle.

Posted: Thu Jul 30, 2020 1:11 am
by Mc Tool
Dude , you need to verify the float level before you start changing things like jets.
A few years ago I had all the jets and air correctors out and they got mixed up, so I went thru all the manuals I had for cars with the weber carb and pinto motor and no two lot of specs were the same so you need the correct combination of jets/correctors. Not answering to the idle screw is indicative of high float level (my car would still idle with the mixture screw screwed right in ), and incorrect valve clearances can have a surprising negative effect too(just going thru all the stuff I learnt before I found the faulty float). How I eventually twigged was parking the car facing up a steep hill at Joe's house ( by doing so the carb is tilted back and as the fuel bowl is ahead of the venturies it causes the fuel level to slosh up the back wall of the float bowl far enough to be higher than the air correctors and fuel flows out of them . This would not happen if the float level was correct )I could only just keep it running, when I looked down the carb I could see fuel welling up out of the main air correctors and pouring down both venturies, . Possibly if you run the front wheels of your car up some ramps ( or jack it up ) and see if it gets worse. Some weber 32/36 's have an anti stall circuit fitted which enriches the idle mix if manifold vacuum drops to low ,if the diaphram is holed this can cause issues too.
Dont get disheartened.....coz when you get it sorted you will be happier :)

Re: Car smells rich on idle.

Posted: Fri Jul 31, 2020 4:31 pm
by Major_Tom
Bug wrote:
Thu Jul 23, 2020 10:14 am
Wish I could work out how to be both idle and rich at the same time :xd:
I smelled Rich a few times.. he didn't take kindly to it to be honest.

Re: Car smells rich on idle.

Posted: Fri Jul 31, 2020 5:58 pm
by D366Y
Major_Tom wrote:
Fri Jul 31, 2020 4:31 pm
Bug wrote:
Thu Jul 23, 2020 10:14 am
Wish I could work out how to be both idle and rich at the same time :xd:
I smelled Rich a few times.. he didn't take kindly to it to be honest.
Did your call smell Rich too? Mine did and he got even shirtier about he whole thing

Re: Car smells rich on idle.

Posted: Fri Jul 31, 2020 8:32 pm
by Major_Tom
D366Y wrote:
Fri Jul 31, 2020 5:58 pm

Did your call smell Rich too? Mine did and he got even shirtier about he whole thing
Have you gone mad sir? What is the meaning of this curiously structured sentence?

Re: Car smells rich on idle.

Posted: Sat Aug 01, 2020 8:48 am
by 340truck
Allan mcl wrote:
Wed Jul 29, 2020 7:18 pm
Could anyone tell me what the correct size idle jets I would need for weber 32/36 for a 1600, I believe mine is still jetted for 2.0l tried to turn mixture screw down but doesn't run wright.
Thanks in advance.
Screwing the idle mixture screw will not change the way the car drives. It will only change mixture at idle....it does exactly what it says and only that. Also, a 1600 pinto with a 2ltr 32/36 carb will run and drive excellently without messing with the jets. That's a fact, many people including me have done it. If you want the car running absolutely perfect with a 2ltr carb then you must go to a rolling road and have the jets sorted there (and pay for it). Anyone who says put such and such a jet in to sort it is talking rubbish.

The procedure for sorting idle mixture is on here many times...do a search. But remember, it's pointless until the ignition system is in tip top condition including timing.

Re: Car smells rich on idle.

Posted: Sat Aug 01, 2020 7:25 pm
by Mc Tool
Here's a thought . The secondary barrel has an idle circuit ( just to keep fuel moving as sometimes the secondary doesn't get used for a while ) and there is a throttle stop screw accessed from under the carb base ( carb off job to adjust ) if this is out of adjustment it will cause idle issues
IMG_20200802_072229.jpg
These are old publications now but still a good read , the come up on ebay or amazon every now and then.

Re: Car smells rich on idle.

Posted: Sat Aug 01, 2020 9:27 pm
by Mr B
Mc Tool wrote:
Sat Aug 01, 2020 7:25 pm
Here's a thought . The secondary barrel has an idle circuit ( just to keep fuel moving as sometimes the secondary doesn't get used for a while ) and there is a throttle stop screw accessed from under the carb base ( carb off job to adjust ) if this is out of adjustment it will cause idle issues
IMG_20200802_072229.jpg
These are old publications now but still a good read , the come up on ebay or amazon every now and then.
You know what MC you might have a point here, I had exactly what you're describing on a 390 Holley, I couldn't get the idle speed down and I had to richen the mixture much more than it should need just to get the engine to idle, turns out the secondary throttle blade's were open slightly allowing extra air into the engine which was being compensated for with the extra rich mixture hence it absolutely stunk on idle, took the carb off, closed the secondary blades, I then had to weaken the mixture as now it was way too rich, lesson learned!

I realize the Holley is a different animal to a Weber but even so...

Wayne

Re: Car smells rich on idle.

Posted: Sat Aug 01, 2020 9:36 pm
by Mc Tool
Ha , :) that's what made me think of it , I too have a 390 holley and it too has an idle circuit on the secondaries, I think from memory that the secondary throttle plate opening is set with a 10 thou feeler gauge down the bore between the plate and throttle bore wall .