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Rover V8 lumpy running, low fuel pressure or ignition?

 
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sweatyfox
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Joined: 05 Aug 2017
Posts: 1



PostPosted: Sat Aug 05, 2017 8:47 pm    Post subject: Rover V8 lumpy running, low fuel pressure or ignition? Reply with quote

Hi all,

Iíve been having some running issues with my car with either fueling or ignition.

When started the other days it was lumpy and missing. Decided to go for a drive and it was still missing a few minutes later I had total loss of power and engine cut.

I tried to start it and nothing at all, didnít even try to fire.

After about 20 minutes it fired up and I was able to get back home but still running lumpy.

Have since been out for another drive, again running lumpy and at one point was total power loss and then kicked back in with a jolt.

It seems to be running ok at tickover but havenít been back out since.

The car setup is a Rover 3.5 V8, running Twin 1.75Ē SU carbs, low pressure Facet fuel pump. Has always run fine until this week.

Any ideas to what the problem could be for these symptoms?
I was thinking to have total power loss could be total fuel starvation or ignition failure. Possibly thinking issues could be:
Coil
Ballast Resistor
Distributor
Fuel Regulator
Other?

I have tested the fuel pump and output pressure was 6psi.
The fuel regulator output pressure tested at 0psi. Well nothing showed up on the gauge, but when you put the pipe into a bucket fuel flows pretty well, just no significant pressure.

Is this likely to cause problems?

Or should twin 1.75Ē SU carbs definitely have a positive fuel pressure of around 3psi?

Thanks in Advance,

Sweatyfox
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Rover 3.5 V8, Supercharged, Twin SU carbs
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stevieturbo
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Joined: 18 Nov 2006
Posts: 3382
Location: Northern Ireland

1980 Ford Granada

PostPosted: Sun Aug 06, 2017 3:57 pm    Post subject: Reply with quote

Same basics.

Fuel, air, spark...and all at the correct times.

Compression test, etc etc

basic servicing, could be plugs, leads, coil etc
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9.85 @ 144.75mph
202mph standing mile
http://www.youtube.com/watch?v=XgWRCDtiTQ0
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moppit
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Joined: 03 Jun 2014
Posts: 67
Location: Winchester, UK


PostPosted: Tue Aug 15, 2017 11:23 am    Post subject: Reply with quote

Had similar issues after a car re-build.

Bad earthing (loose, corroded earths) and new plug leads and dizzy cap fixed it on mine.
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NG TC V8 3.5 Edelbrock 500, Eddy manifold, Typhoon cam, ported heads
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