right hand bend gremlins...

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timb2117
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right hand bend gremlins...

Hi guys any advice would be great.

2005, 1800 K series, on particularly right hand corners at 4/5000 rpm the car stutters, literally just does not pull cleanly, pretty intermittent usually on track day as I don't get near to its limits on most roads most days!

Full tank of fuel too.

I've changed coil packs x2, plug leads, fuel filters (inbound and return to tank) and am considering checking out the sock filter in fuel tank. I have got a fuel pressure gauge to test the pump but its all banjo joints and crimped connections, aghh.

the pump is mounted on drivers side of tank which would possibly indicate I need a swirl pot - but even with   full tank of fuel she does it.....

Any other ideas?

elie boone
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Long shot but maybe some part on the suspension is pulling or touching the electrical loom ?

Wrightpayne
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Crank sensor?

timb2117
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Would crank sensor do it all time ? Its very specific to right handers high revs. Suspension v.s. loom/ earth I like I will hunt around thanks guys

revilla
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I recently had to diagnose a K Series that developed an aggressive misfire at something like 6500rpm. It revved cleanly right up to that point every tine then the engine just started cutting in and out. Same RPM every time. In the end, quite surprisingly it turned out to be broken wire in the loom. In this case one of the positive supply feed wires that had been extended down to the starter motor to put it after the FIA switch was broken where it joined the crimp terminal, but a layer of heat-shrink hid it and held the broken ends together. At 6500rpm there was a resonance that caused the wire to vibrate and break the circuit. It took ages to work out what was going on. Could you have something similar? I'm just wondering if the high RPM coupled with the G loading pulling the loom to the left in right handers is exposing a bad connection somewhere? Might be worth working around the engine loom giving everything a good pull and wiggle and see if you can induce a misfire at all with the engine idling.

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

timb2117
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Drattit did you guys have to make such good sense? Yup as part of the rolling restoration I have re wrapped the loom and whats the betting I've disturbed an age related gremlin I will definitely give the ideas a go many thanks all for your usual logic which sometimes I lose in the rush to "cure a part" I'll get my patient head on and dig in. (Would be a touch easier if I could get someone here in Brisbane AUS who could plug and play my ecu...ha ha.)

timb2117
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Ok guys tried twisting and turning the loom cannot cause the fault.

Back on track yesterday its a bit worse, right and left handers seems just stuttering as you pull through 5500 - 6500 then clears its throat and runs ok but maybe top end too, not quite pulling cleanly maxxed out at 96 mph. Could it be fuelling? pump not able to keep pressure up in the lines as it is really only at the higher revs and therefore high need for fuel? Is anyone supplying the K series in tank pump still.

One other lead may be that I replaced the old plastic fuel cap with a stainless one and whilst I ensured all the pipework was retained did the old cap itself vent? I'd hate to think I have created a vacuum in the tank, so the Q is - does the actual cap vent?

Sorry million Q's as I work my way through this one, thankyou.

timb2117
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Also can anyone recognise what pump fits in here? 

ECR
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The metal part the your photo shows is the holder (originally from a Metro I think) and is no longer available so hold on to it. It carries the pump inside the tank.

Google 6443327 for standard output pump or 6443228 for the higher output pump fitted to the JPE (and K series R500 I think.)

My feeling is that its not the pump. Can you fit a fuel pressure gauge and see if the pressure drops during cornering?

SM25T
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When my tank was replaced 2 years ago, to future proof it, Seven Workshop had a plate made with a pick up tube in it. This replaced the standard pump mounting end plate. I now have a simple external in line fuel pump mounted next to the fuel filter on the bulkhead behind the driver seat. Simple, cheaper and easy access.
Wrightpayne
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SM25T,

Do you have any pictures of what they did inside the tank. Also any of the pump install.

It sounds a good, long term solution!

Ian