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Capri engine cut out at 3000rpm 

 

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 Post subject: Capri engine cut out at 3000rpm
Posted: Mon Aug 20, 2012 2:58 pm 
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I have 1990 model Capri whci seems to cut out under power at about 3000 rpm, then when the engine slows down to around 2200 it will accelerate again. Fuel filter has been replaced but fuel pressure on the rail is a bit low.

Any ideas
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Mon Aug 20, 2012 3:35 pm 
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pump
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Mon Aug 20, 2012 4:19 pm 
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Thanks, I did think fuel pump initially, the only problem with that was that the cut out seems to be at a very specific engine Rpm
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Mon Aug 20, 2012 6:22 pm 
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Sounds fuel related to me too.....

Could be the pump is cutting out at a particular flow rate.....

Another thought is it could be a partially blocked pick up... Higher engine RPMS draining the lines quicker than the blocked pick up can supply.... Rev's drop, fuel line refills allowing revs to build again... cycle continues!!

It's not very technical, but it's possible.....

 

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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Mon Aug 20, 2012 7:57 pm 
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fuel pressure reg?

 

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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Tue Aug 21, 2012 7:28 pm 
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i had a coil react like that once, it was like it hit the rev limiter @ about 3200.

with the fuel pressure, how low is a bit low?

 

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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Wed Aug 22, 2012 12:54 pm 
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Fuel pressure was 108psi, factory specs said should be around 175psi, i have replaced the fuel pump and the problem is all but gone, just a short hiccup at around 3000, but i will replace the coil also, thanks for the advice.
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Wed Aug 22, 2012 1:40 pm 
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Humphrey wrote:
Fuel pressure was 108psi, factory specs said should be around 175psi, i have replaced the fuel pump and the problem is all but gone, just a short hiccup at around 3000, but i will replace the coil also, thanks for the advice.


are you sure its ment to be 175psi??
175psi is a ultra extremly high fuel pressure..
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Wed Aug 22, 2012 3:08 pm 
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I'm not positive it should be that high as I rang ford direct to get the specs.
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 Post subject: Re: Capri engine cut out at 3000rpm
Posted: Wed Aug 22, 2012 3:10 pm 
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Humphrey wrote:
I'm not positive it should be that high as I rang ford direct to get the specs.


you may have kpa ans psi mixed up :oops: this should help you with testing the fuel system perrya.hubpages.com/hub/Testing-for-1991-94-Mercury-Capri-Fuel-Related-Issues

 

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