idle at 3000 after hot day in traffic jam

[ghunterglas]

hello all, broke my own rule yesterday by taking the elan out on a job ( normally only drive it when i don't need to be anywhere) without noticing that police scotland had closed the main road to the west coast.
after an hour of 2mph the fans coming on/ bringing temp down there was a lurch, managed to catch it before a stall, engine light came on, then wouldn't rev past 3 in gear, managed to get up a big hill in helensburgh on idle in 4th gear & then nursed car to loch lomond,
and then back home avoiding motorway.
just started it up after checking plugs/ hoses/air/water & oil it started 1st go but revved to 3000, blip on throttle brought it back to 2 but then rose to 3 again
its 90 NA and was running like a sewing machine on friday.
any thoughts ? it needs to go for mot at end of month but as sodding usual looks like it'll be parked up on the drive while summers arrived for a week.
appreciate any help/ guidance
Graeme

[Tuga2112]

hello all, broke my own rule yesterday by taking the elan out on a job ( normally only drive it when i don't need to be anywhere) without noticing that police scotland had closed the main road to the west coast.
after an hour of 2mph the fans coming on/ bringing temp down there was a lurch, managed to catch it before a stall, engine light came on, then wouldn't rev past 3 in gear, managed to get up a big hill in helensburgh on idle in 4th gear & then nursed car to loch lomond,
and then back home avoiding motorway.
just started it up after checking plugs/ hoses/air/water & oil it started 1st go but revved to 3000, blip on throttle brought it back to 2 but then rose to 3 again
its 90 NA and was running like a sewing machine on friday.
any thoughts ? it needs to go for mot at end of month but as sodding usual looks like it'll be parked up on the drive while summers arrived for a week.
appreciate any help/ guidance
Graeme

long shot BUT
take intake hose out and check throtle butterfly. check if it closes completely.
theres the air iddle screw which may (unlikely) move a bit loose with the heat cycles.

thats a start with a couple of easy checks until the big guns take a look at this post

[ghunterglas]

Tuga2112 you nailed it ! took apart, fiddled, reassembled and now idling cold at 1000 with engine light out !
i owe you pints!
will drive later but sounds great again.
thank you g

[HJ2]

Tuga… YOU are one of the big guns

[ghunterglas]

and thanks to Tuga i was able to drive it for its mot yesterday, and home again with a new mot, now if it would just stop raining..................