Engine surging

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28Injectionford
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Engine surging

Post by 28Injectionford » Sat Oct 23, 2021 9:51 am

24v 1997 probe
Starts no problem runs fast slightly more than normal cold start revs
When reached warm engine surges up and down constant the revs
Any ideas would be appreciated as I don’t think would want drive on road as is
If a specific part is required to swap sort issues il source replacement hopefully from a member through here
Regards Chris g

Kit
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Re: Engine surging

Post by Kit » Sat Oct 23, 2021 10:39 am

Check your coolant levels first :!:

Kit

mojo98
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Re: Engine surging

Post by mojo98 » Sat Oct 23, 2021 5:15 pm

I'm with Duncan (kit) Coolant level 1st,
my 16v MRP, would rev up and down, embarrassing when the school crossing lady would stop me, and the car would rev up/down on its own, I had some funny looks from her,

28Injectionford
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Re: Engine surging

Post by 28Injectionford » Sat Oct 23, 2021 7:51 pm

Hi thanks guys il check tomorrow
Let you know result
Cheers
Chris g

Tott61
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Re: Engine surging

Post by Tott61 » Sat Oct 23, 2021 10:02 pm

Just to echo what's already been said. I changed the antifreeze on my probe and had the same erratic revving I finally rectified it by getting rid of an air lock.

28Injectionford
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Re: Engine surging

Post by 28Injectionford » Fri Oct 29, 2021 8:30 pm

Hi guys thanks for tips hopefully sort out tomorrow if blumin rain stops here
Il try all stated and take for little drive around bromagrove way few straight roads to run her on
Regards Chris g

28Injectionford
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Re: Engine surging

Post by 28Injectionford » Sat Oct 30, 2021 6:41 pm

Evening guys thanks for the tip on water levels
Problem gone away running again nice a quietly as she was before lol
So treated to wash and polish this afternoon all shiny for five minutes
Regards Chris g
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mojo98
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Re: Engine surging

Post by mojo98 » Sun Oct 31, 2021 8:11 pm

Just kept a eye on the coolant levels, (when engine has cooled down, H & S)
Couple of things also to keep a eye on,
Rad cap, when car is up to temp, slow remove the tube off the side of the rad cap, (lead to overflow bottle) if coolant come out of the rad cap plastic pipe, change the rad cap for a new one.

Another source of losing water is the coolong pipe running between the fuel injectors (under inlet manifold)

Coolant pipes in/out base of throttle body.

To be fair check all rubber hoses

28Injectionford
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Re: Engine surging

Post by 28Injectionford » Mon Nov 01, 2021 8:18 pm

Hi thanks for the info
Il be checking levels again weekend and check rad cap leak you mentioned along with all hoses for signs of water leaks
I did add some antifreeze during top up to be fair it took about litre of water max to fill up to the top cap level
I’m thinking if any leaks appear I should see the traces of yellow antifreeze hopfully none would great meaning no leaks
Regards Chris g

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