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kirmet · Posted: Sat Mar 31, 2007 10:26 am Post subject: Poor Running at high rpm

I have a 1980 924 Turbo, it has been siting for more than ten years in a garage. I recently took it out and fired it up. at first it ran pretty good. I have ran a couple of tanks of gas through it and now it is hesitating, learching and dieing.

I have replace the fuel filter (on my third rust in the tank).
I know it needs a cold start valve. hoping not related.

Any help would be great.
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1980 924 Turbo
1959 Austin Healey
1960 MG

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

There's a few different things to check but before you do anything else, have you changed the timing belt?

If that breaks, the rust in the tank will be the least of your worries.

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'80 924 n/a SOLD

kirmet · Posted: Sun Apr 01, 2007 1:31 am Post subject: Poor running 924

the timing belt and water pump were changed shortly before it went to storage, it is however on my list of things to do again because it has been sitting so long. as well as the cold start valve. (hard to start cold)

It needs a fuel pump (noisey but appears to have good preasure)

At times it runs fantastic and you drive it with perm-a-grin then it just starts stumbling like its not getting fuel. I have checked the accessable vacume lines and have trimmed off any loose fitting one.

I let it sit overnight and it runs fine again for while.
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1980 924 Turbo
1959 Austin Healey
1960 MG

Tigger937 · Posted: Sun Apr 01, 2007 1:41 am Post subject: Re: Poor Running at high rpm

Paul · Posted: Sun Apr 01, 2007 2:44 am Post subject:

When you replace a fuel filter on a US 931, make sure you install it with the arrow pointing towards the back of the car (towards the fuel dizzy).
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.