missifre and stall 216 5.5

[bembo449]

on way back from hull this evening when just after I got refuel warning the big fell started jerking ( flashing EML each time ) a bit like when the CPS failed a year or so back , then after another couple of miles he stalled at a junction , immediately restarted ( thinking not CPS ) again pretty violent jerking the rest of the journey home and again stalling at a junction but restarted as normal , not had time to plug in yet but any ideas ? possible coil pack ? plug ? or just low fuel pressure ?

 

[John Laidlaw]

Hmmm not sure, did you plug it in now?

 

[ajlsl600]

what would yr rpm be just before engine stall.

 

[bembo449]

found no codes relating to a misfire , just a couple for low voltage but the battery went flat 2 weeks ago so I put them down to that ! refuelled and did around 12 mles at varying speeds and he was faultless , like nothing had ever happened , so I guess it was down to low fuel level and admittedly that's the lowest ive ever run him down too

 

[ajlsl600]

right !!!!!! fuel press ussualy quite low just before its ran out.

 

[bembo449]

i wont let him get that low ever again

 

[Arudge]

found no codes relating to a misfire , just a couple for low voltage but the battery went flat 2 weeks ago so I put them down to that !

Oh no no no.

Low voltage is a killer and is caused by poor connections. Low voltage to the coil packs can cause misfire and low voltage in my case led to a poor electrical supply to the engine ECU, which in turn also caused misfire.

 

[DREAMER NO2]

Low battery will kill the car .They are made to cut off, thats if power is to low to keep information in the computer

 

[Arudge]

Low battery will kill the car .They are made to cut off, thats if power is to low to keep information in the computer

If there's enough power to start the car then alternator takes over as soon as it's running. Once running the alternator will increase the the system voltage from 12.6V to 14.4V. It may be worth checking the alternator output, but generally speaking the dash will light up if there's an issue there.

 

[Arudge]

Any vehicle over 10 years will start to suffer with electrics. On mine there was so much resistance in the ground earth strap from engine to chassis I'm surprised it worked at all.

Plugs become slightly corroded and therefore increase resistance, it can be a utter nightmare tracing these issues.

A friend's Subaru would stall immediately on starting and continue to stall until warm, then it was fine. We found the plug to the temperature sensor created more resistance than it should, add that resistance to the sensors own resistance and the ECU always thought the engine was warmer than it actually was. So the cold start sequence never engaged. His was a 2004.

Hours melt away when testimg electrics.

Nightmare.

 

[LostKiwi]

Nightmare

Ain't that the truth. And then MB helped by making self disintegrating looms in the 90s....

 

[Craiglxviii]

Ain't that the truth. And then MB helped by making self disintegrating looms in the 90s....

You'd be bored without such shenanigans...............

 

[LostKiwi]

You'd be bored without such shenanigans...............

I have a 230 with ABC and SBC. Plenty there to stop boredom without disintegrating wiring harnesses!

 

[bembo449]

ive just cured a Mitsubishi L200 with a strange electrical issue , codes said MAP sensor but it was actually the connector to the MAP that was corroded internally , cleaned it up and she runs like a dream ! that's cars for ya