Author Topic: Engine Problems (Read 5155 times)

Spudzmonkey · « **on:** June 05, 2005, 01:49:12 PM »

Hello, I'm new.

Just got my D reg Air cooled back from the garage after replacing a rotten float and choke cable. Now I've got a missfire and the car refuses to idle unless I always use choke - which also stops the missfire. You can probably tell that I'm a complete monkey when it comes to mechanics, but I want to learn. Does it sound like I need to play with the idle speed, throttle cable or choke?
Stalling a 126 is no fun when youve got angry kids chasing you!

ChrisRLewis · « **Reply #1 on:** June 05, 2005, 03:10:36 PM »

Sounds like the mixture is to weak? especially if it was ok before the garage played with it!
possible causes, jets clogged, carb not secured correctly or broken gasket?
i would take it back to the garage and tell them it's not right after they have repaired it.
If you want to tackle it your self get a haynes manual, which will explain on how to remove the carb off the engine probaly needs to be stripped down and clean the jets use a carb cleaner aerosol and an air line. Check all settings like float height, idle settings and replace the carb gasket when reinstalling.
good luck!

slater · « **Reply #2 on:** June 05, 2005, 03:19:59 PM »

I reckon you need to try increseing the idle speed slightly and seeing if that cures the problem.

It sound like the engines running too lean (not enough fuel, too much air) on idle. Im not sure how to adjust idle mixture on these carbs tho

Spudzmonkey · « **Reply #3 on:** June 05, 2005, 03:26:07 PM »

Cheers!
Engine continues to over run after turning off. Plus I sometimes get a smelly smokey cabin - which could be caused by the choke being out/too much fuel. How can I tell if the engine is overheating?

fiatfsm · « **Reply #4 on:** June 05, 2005, 05:30:44 PM »

Check your points gap, on aircooled its critical and you need it spot on. Youll know if it overheats, it will not perform well and pink under load (kind of metallic rattle). If its running on generally it means your idle speed is too high, could just be that. It does sound like its running lean as well. Take your plugs out after a good 15 mile run and see what colour they are, should be a sort of fawn colour.

gorilly · « **Reply #5 on:** June 05, 2005, 09:30:24 PM »

Quote from: "Spudzmonkey"

Cheers!
Engine continues to over run after turning off. Plus I sometimes get a smelly smokey cabin - which could be caused by the choke being out/too much fuel. How can I tell if the engine is overheating?

i've had this before on my car...

it was caused by the carb not being in tune! the mixture was too rich and too much petrol was being fed...

when i turned the car off the excess petrol would still get burnt causing the car to over-run

Chris Lakin · « **Reply #6 on:** June 06, 2005, 01:05:11 AM »

Tony's fiesta does that, i think also it can be hotspots in the combustion chanber from carbon deposits building up over time. Indicated by filthy spark plugs. Tony (my brother in law) changed the oil and that alone helped.

Gorilly's right, a carb tune is probably needed. My bis passe dits MOt the otehr day but the emmisions are terrible and somtimes it runs for a couple of seconds after ignition is turned off. I dont know if this is a characteristic or problem.

did the oil change mike, filled it up too much so have to drain a bit 2moro, the drive was is on a massive slope so very difficult to get it between min & max. I fyou over fill sump with oil it can blow your engine from the oil pressure so very important!!

Chris

Spudzmonkey · « **Reply #7 on:** June 10, 2005, 07:24:52 PM »

Thanks for the tips! I tried playing with the idle speed. My car still stinks tho'. Plus the missfire has returned... Now I've noticed a large air bubble in my fuel filter - could this be causing my woes?