too much petrol and high revs help

[kittycar]

just got my car back frm the garage and they cant help? its started to rev up and past 3000 revs on its own every few seconds then if throttle put in itl cut out, its using massive amounts of petrol but they tell me the engines not wired up so they cant pinpoint it, can anyone help, could it be choke, or lambada or timing belt cos they suggested all 3 but think they just want as much cash as poss, its a 2li, hope u can help? thanks

[Rusty_CallyT]

could be a blocked fuel return causing massive overfueling... had that problem on a cav once was a begger to work out, altho on the cav it was misfireing and barely ran untill hot.

Could be the CTS or the lambda as mentioned

[kittycar]

whats the cts rusty cally?

[V6_E]

cts = Coolant Temperature Sensor

Timing belt nope, wont be that
Choke is controlled by the ECU which gets its info from the sensors
Lamda sensor if at fault would make it run like a bag of nails but not cut out like you mention

Rusty_CallyT's mention of the fuel return valve could be right but I have not had that so cant say yes or no on it

Are there any ECU error codes ? My First thought was the good old Idle speed control valve at fault or the air flow meter also
E

[niggy0]

have you tried to clean your idle speed control valve (there's plenty of links on the site) - sounds similar to my old 16v's problem - it cured that only costs £5 for a can of carb cleaner and an hour

[T.F.S.]

i have a solution for cars that do this, have fixed a few now that no-one else could fix

there are two ways...adjust the screw on the pedal to increase rpm to 1001 rpm, the revs will now not fluctuate, the other way is to fit a small radiator valve from B+Q to the top hat after the ICV, you then close the valve a bit and the ICV is powerless to adjust the idle beyond 1001rpm

you can say thats not fixing the problem but its a hall of a lot beter than cutting out all the time and revving up in traffic

[kittycar]

thanks for the help, we replaced the air flow meter and the idle tickover valve, it seems to bee running okay but still really strong smel of petrol and dont know yet if its using any less fuel. it was on the computer at the garage but they said they couldnt test for fualts as its not wired properly.......

[noelboy]

The smell of petrol and the amount it's using sounds simarlar to a problem I recently had.
I had a leak on my downpipe before my Lamda sensor so it meant that my car was overfueling and using loads of petrol.
Also because of the hole I could smell petrol when I had the windows were open.
Maybe worth getting a local quick fit to stick it on a ramp for you, they'll tell you if it's blowing for free!

[kittycar]

MMM its just had a new downpipe and catalytic bit put on, maybe its worth another look, ill just replace each bit till i can find the one thats causing it, thank christ for scrapyards though! cam belt next, thanks 4 help