amazingtrade
Mad Madchestoh fan
After the car came back from the MOT it was ideling at 1800-2000rpm and over reving when slowing down to about 5000rpm.
My machanic cleaned out the idle control valve but this had no effect. So on Saturday I spent the afternoon tinkering under the bonnet, I noticed when driving it the car dosn't really slow down when releasing the throttle. I then checked the throttle and the cable seemed perfectly tight, it would tighten anymore so there did't seem any problems here.
The next thing I start listening for manifold leaks and I then noticed a breather pipe which connects from the oil filler cap to the fuel injection system has a plastic elbew missing which means there is a huge crack in the pipe letting in air. The purpose of this pipe is to release the gasses from the engine, so I put on tuck tape round the split, start the engine it idles at 1100rpm.
Went for a test drive and it was still over revving but after 100 miles this over revving has really been reduced as the ECU probably has learnt new stuff.
The cost of the part from Ford? £1.25.
There was also a miss fire at the lower speeds but the plugs etc are only a year old and the I know the gaps were set correctly, so I put lots of redex in and this seems to have solved the miss fire along with sealing the exessive source of air.
I feel proud because for the first time in my life, I have fixed a car and something that a garage failed to diagnose.
My next step is to get the car ideling at 800rpm again, I am hoping when I buy the new elblew joint this will cure it as I am sure my tempory tuck tape measure is not completly air tight!
My machanic cleaned out the idle control valve but this had no effect. So on Saturday I spent the afternoon tinkering under the bonnet, I noticed when driving it the car dosn't really slow down when releasing the throttle. I then checked the throttle and the cable seemed perfectly tight, it would tighten anymore so there did't seem any problems here.
The next thing I start listening for manifold leaks and I then noticed a breather pipe which connects from the oil filler cap to the fuel injection system has a plastic elbew missing which means there is a huge crack in the pipe letting in air. The purpose of this pipe is to release the gasses from the engine, so I put on tuck tape round the split, start the engine it idles at 1100rpm.
Went for a test drive and it was still over revving but after 100 miles this over revving has really been reduced as the ECU probably has learnt new stuff.
The cost of the part from Ford? £1.25.
There was also a miss fire at the lower speeds but the plugs etc are only a year old and the I know the gaps were set correctly, so I put lots of redex in and this seems to have solved the miss fire along with sealing the exessive source of air.
I feel proud because for the first time in my life, I have fixed a car and something that a garage failed to diagnose.
My next step is to get the car ideling at 800rpm again, I am hoping when I buy the new elblew joint this will cure it as I am sure my tempory tuck tape measure is not completly air tight!
.
