Running Lean / Running Rough
Discussion
Hi all, as above 
These are the right side NGKs B7EC S. Note how lean the centre 2 are !!
She started running lumpy last w end, it's as if she's stumbling / missing around 2 - 2,500 rpm. Done it before a couple of years ago, then cleared.
The centre 2 plug tops and the leads have a white powdery coating of corrosion, which I've sprayed with cleaner. Could this be causing the rough running ?
These are the right side NGKs B7EC S. Note how lean the centre 2 are !!
She started running lumpy last w end, it's as if she's stumbling / missing around 2 - 2,500 rpm. Done it before a couple of years ago, then cleared.
The centre 2 plug tops and the leads have a white powdery coating of corrosion, which I've sprayed with cleaner. Could this be causing the rough running ?
Edited by neutral 3 on Monday 13th July 16:21
Right bank Plugs re fitted, checked the left bank lead / plug tops and no visible corrosion. Fired the beast up and it's running lumpy.
Set off and the systems are still there. Do about 4 miles and it's getting worse. Get back and it's struggling to idle. Open the bonnet and my ruddy Steve Heath bonnet props mount has disapeared back up the road somewhere !
Engine dies and now won't re start.
I'm thinking ignition coil breaking down ? Or fuel pump ( the original one ) but fuel pump is priming when imobilser is pressed.
Any ideas anyone ? My 98th birthday on thurs and I want to drive it !!
Set off and the systems are still there. Do about 4 miles and it's getting worse. Get back and it's struggling to idle. Open the bonnet and my ruddy Steve Heath bonnet props mount has disapeared back up the road somewhere !
Engine dies and now won't re start.
I'm thinking ignition coil breaking down ? Or fuel pump ( the original one ) but fuel pump is priming when imobilser is pressed.
Any ideas anyone ? My 98th birthday on thurs and I want to drive it !!
Pulled the plugs on the left bank earlier and they look similar in color to the ones on the right bank. Span her over on the starter and the left front has a spark.
Cleaned the plugs and put them back in, turned the ignition on, pressed the imobilser fob button and the fuel pump primed. Span her over and won't start !!
Put a spark plug in the right front lead, turned her over on the starter and a very strong spark.
So what's wrong ?
Will have to borrow a compression tester.
Checked 5 of the leads and all have spark. Disconnected then re connected the ECU and the birds nest of wiring and relays in the foot well in case of corrosion.
Batt was very low last night. Re charged it then tried again to start it. Fuel pump is priming and there is fuel in the pipe under pressure, but still won't fire. I'm Completly baffled as to why it won't start.
Towing it round to my garage in the morn for a compression test. Fingers XD it's not head gasket or bent valves !!
Batt was very low last night. Re charged it then tried again to start it. Fuel pump is priming and there is fuel in the pipe under pressure, but still won't fire. I'm Completly baffled as to why it won't start.
Towing it round to my garage in the morn for a compression test. Fingers XD it's not head gasket or bent valves !!
Quick update , Just got to the garage, pulled the plugs, but access is so tight to get a compression tester in !
No 4 pot ( right bank ) is showing 120 psi , this is the cylinder with the plug that was very white. And now my year old Halfords battery has expired.....TVRs.....don't you just Love them !
No 4 pot ( right bank ) is showing 120 psi , this is the cylinder with the plug that was very white. And now my year old Halfords battery has expired.....TVRs.....don't you just Love them !
Edited by neutral 3 on Thursday 16th July 11:42
Edited by neutral 3 on Thursday 16th July 12:05
Compressions all tested
No 8 - 215 No 7 - 175
No 5 - 160
No 3 - 158
No 1 - 179
No. 6 - 210
No. 4 -102
No. 2 - 172
4 is very low and this is the cylinder with the plug that was very white in colour. So it's looking like head gasket time, but she should still fire.
Strong smell of fuel when testing the compressions and the comp tester is wet with petrol, so fuel is getting through.
No 8 - 215 No 7 - 175
No 5 - 160
No 3 - 158
No 1 - 179
No. 6 - 210
No. 4 -102
No. 2 - 172
4 is very low and this is the cylinder with the plug that was very white in colour. So it's looking like head gasket time, but she should still fire.
Strong smell of fuel when testing the compressions and the comp tester is wet with petrol, so fuel is getting through.
She won't start Number 7 ( died and wouldn't start last Sunday ) so no chance of warm bores and yes I disconnected the coil.
My electrical / fuel injection diagnostic skills are very poor, but I'm baffled as to why it won't start....
Any one in Essex want to come over and have a go at getting it running ??
My electrical / fuel injection diagnostic skills are very poor, but I'm baffled as to why it won't start....
Any one in Essex want to come over and have a go at getting it running ??
Edited by neutral 3 on Saturday 18th July 13:08
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