Advice please

[Hotwire]

Can anyone help with a "revs" problem?

I had a cam replaced under warranty and the car drove like a dream for a while. Now it appears to be pinking, so I gather the timing will need fixing. My main worry is this weekend, after doing some 400 miles with no problems, the car's revs don't seem to drop below 2000 rpm when idling. Once the car is stationery, after about 10 secs the revs return to normal idle speed, approx 1000 rpm. I can tell between gear change that the revs are higher than they should be. This has only started today when the engine is hot. When I parked and started after some two hours, the revs were fine, then when the engine got hot again they went up. The car was serviced six weeks ago, hence the cam change, and there appeared to be no further problems then.

I have not had time to check the stepper motor. Could this be the problem? Any advice would be most helpful.

Thanks in advance.

[whitechimp500]

Check the vacuum advance Module on the distributor has'nt come loose,there are two small screws holding it on to the body.
This happened to my Chim on a track day years ago ,started pinking badly ,thought i'd mullered the engine , turned out these screws had vibrated loose knocking the Timing way out.

[Hotwire]

Thanks very much for this. I'll check tomorrow when light.

[Hotwire]

Thanks for your assistance Whitechimp500.

Upon closer inspection, found the stepper motor was slightly loose so have tightened. Hope this will cure the problem. In the meantime, booked in to get the timing sorted. Do you know if this can be done without the use of a strobe at home. I was thinking about marking the distributor point just in case I encountered problems, but I wondered wether I could in fact try to rectify the timing at home as I can't get this done until the 4th August, which I can't sacrifice the GROWL for.

[old64er]

Put some octane booster in it if you are unsure about the timing or just scribe a line on the dizzy body and block and have a play around?

[Hotwire]

Thanks Old64er. I'll give that a go at the weekend.

Nice looking griff you have there! Colour not dissimilar to mine. Will you be at the Growl in August?

[Hotwire]

To cure a pinking problem with the timing, and to retard the ingnition, do I have to move the distributor towards or away from the engine?

[old64er]

The colours look similar in a photo but mine is more of a blue than green.

Sorry, i will not be able to make it to this years growl, hopefully next year???

Forgot to say that the dizzy will need turning anti-clockwise to retard the timing (from memory, someone please confirm )

[Hotwire]

Thanks Old64er. Shame you can't make the Growl. I was down to attend last year but didn't make it due to commitments and was absolutely gutted.

Thanks for the advice on the timing. I'll try that one.