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1995 24v - car idle hunting between 1000-1500 revs
Posted: Tue Oct 21, 2025 9:09 pm
by Savernake-breese
Hi experts,
The car has been running great but on the drive home it was hunting / not idling at a steady level.
Moving between 1000-1500 revs.
Not hard the car long - what should I be looking for / doing to fix.
Thanks very much.
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Wed Oct 22, 2025 7:15 am
by Micron
Hi,
have you checked the water levels? Remove the flat cap ( not the sprung one) on the engine, and check that the water is to the brim
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Thu Nov 06, 2025 6:43 pm
by Savernake-breese
Thanks @Micron the water in the cap to the left of the engine is full to the brim. The water under the cap near the front on the right near the battery is up to the top of the pipe coming in on the lower right had side of the tank. Both of them are sprung caps.
Assume those levels are right. Any other suggestions? Thank you
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Thu Nov 06, 2025 9:33 pm
by jrh
Really check that ALL the tiny flexible pipes around the MAF unit are properly connected.
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Fri Nov 07, 2025 4:55 pm
by Micron
Savernake-breese wrote: ↑Thu Nov 06, 2025 6:43 pm
Thanks @Micron the water in the cap to the left of the engine is full to the brim. The water under the cap near the front on the right near the battery is up to the top of the pipe coming in on the lower right had side of the tank. Both of them are sprung caps.
Assume those levels are right. Any other suggestions? Thank you
The cap on the engine shouldn’t be a sprung cap, but a flat cap
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Fri Nov 14, 2025 5:21 pm
by CharlesUK
I’m using a spring cap for both, it doesn’t matter as there is now where for the pressure relief to go anyway. I had a similar problem and just needed to adjust idle air control screw. Should be instructions on the Oracle
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Sat Nov 15, 2025 12:16 pm
by Micron
CharlesUK wrote: ↑Fri Nov 14, 2025 5:21 pm
I’m using a spring cap for both, it doesn’t matter as there is now where for the pressure relief to go anyway. I had a similar problem and just needed to adjust idle air control screw. Should be instructions on the Oracle
Why do you think that there is no where for the pressure relief to go?
They were designed to have a no. Pressure cap on the engine, a pressure one by the radiator, with a pipe to the expansion tank?
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Sat Nov 15, 2025 12:51 pm
by Slick
After breaking down once due to the sprung cap failing I’ve always used two since, means I have a spare handy if it ever happens again
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Wed Nov 19, 2025 5:16 pm
by Sunfly
Check as per jrh and I'd check you've got a good flow through the throttle body as hunting is typically the outcome of poor or no flow.
Re: 1995 24v - car idle hunting between 1000-1500 revs
Posted: Wed Dec 03, 2025 7:55 pm
by CharlesUK
Micron wrote: ↑Sat Nov 15, 2025 12:16 pm
CharlesUK wrote: ↑Fri Nov 14, 2025 5:21 pm
I’m using a spring cap for both, it doesn’t matter as there is now where for the pressure relief to go anyway. I had a similar problem and just needed to adjust idle air control screw. Should be instructions on the Oracle
Why do you think that there is no where for the pressure relief to go?
They were designed to have a no. Pressure cap on the engine, a pressure one by the radiator, with a pipe to the expansion tank?
This is exactly what I mean, the one on the engine can use a sprung cap, if the pressure is enough to activate the cap it has nowhere to go so won’t affect level or pressure
