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Topic: Cosworth rebuild (Read 479 times) |
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Matt
Senior Member
Manual'd and a 4.0 in the making
 
Posts: 2816
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Cosworth rebuild
« on: Aug 19th, 2007, 9:30pm » |
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hey all
got a problem with the cossie,
replaced the cylinder heads and bolted all back up but when running (idling and still) the reves will shoot up and stay up, this can happen from first turn of the key or it will happen after 5 mins of the car idling perfectly, checked all vac lines there ok, last time it shot up it was after i moved the steering wheel so im kind of thinking it may be something to do with the ps pressure switch
need any help to diagnose
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FDS2000 Scans - Birmingham
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tintin
Full Member
I'm a YaBB newbie!
Posts: 592
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Re: Cosworth rebuild
« Reply #1 on: Aug 19th, 2007, 10:35pm » |
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my idle was giving me gip for ages, turned out the garage had put the idle control valve back on back-to-front. mine rose sharply, then dropped again after a set amount of time. worth a check....
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'95 Cosworth Ultima
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: Cosworth rebuild
« Reply #2 on: Aug 19th, 2007, 11:33pm » |
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I'd start with the TPS, maybe coming out of idle range and enriching the fuel mix and making the engine race. Kept happening on the Jag when I bought it, 3000rpm idle in rush hour traffic...not fun 
Didn't you say the looms were shot? Maybe it's a loom gremlin?
Good luck 
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Cosworth rebuild
« Reply #3 on: Aug 21st, 2007, 7:42pm » |
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thanks for the suggestions
well almost got it sorted now, its not racing up any more, swapped the loom for my 98's one, not an easy task i can tell you!
still a small problem but i think that maight be cured by dropping the battery off and letting the ecu reset, its had a pounding with the bat on and off and with the car starting and going straight to 3000 rpm its prob configured its self wrong
got a sucking sound which is gonna be an air leak, think it may be in the inlet, but thats not to much of a problem,
she sounds almost sweet as a nut now, i think after a few runs it will all settle in nicely
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FDS2000 Scans - Birmingham
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: Cosworth rebuild
« Reply #4 on: Aug 22nd, 2007, 1:35am » |
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Sounds like it's sucking air some where but also sounds like you know that now!
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Dave
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Cosworth rebuild
« Reply #5 on: Aug 22nd, 2007, 7:07pm » |
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ITS RUNNING!!!
thanks all,
Matt
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FDS2000 Scans - Birmingham
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Cosworth rebuild
« Reply #6 on: Aug 23rd, 2007, 6:59pm » |
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PASSED THE MOT
with flying colours to! the lad doing it fell in love with the car lol  
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FDS2000 Scans - Birmingham
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