intermitant misfire on corrado G60 engine

[G601950cc]

Hello to all,
91 corrado G60, plenty of usual mods done to the old girl. Thought she was over fueling but have changed injectors  back to std and chip back to std. New blue coolant temp sensor, and lamba, new knock sensor. Problem I have is when engine started she runs lovely, after warm up I can drive a mile sometimes less  Engine will misfire usually 88 - 96 degrees. stop driving misfire still there.misfire usually gets worse and stalls engine. If I can get to drive without missing a beat then cruise along at about 3000rpm runs smooth then phu-phu-phu-phu smooth phu-phu-phu-phu smooth again pattern seems to be the same. I'm thinking hall sender in dizzy. Anyone any ideas. She sounds like a scooby, I don't want a scooby.

[Diamond Hell]

Replace the ECU MAP (IIRC) sensor pipe, with one of the same length (that bit's important).

Unplug the lambda and see if it makes any difference.

Check your knock sensor wiring to see if it's knackered.

Compression test.

Come back after that lot.

[G601950cc]

Engine has had full rebuild new crank pistons everything has been renewed. Tb to ecu  pipe new 1m long. Brand new knock sensor, new lamba  sensor. Haven't done compression test yet got to borrow one to do that job.
Drove car about for a mile with lamba sensor disconnected same problem

[danny_p]

rev counter do anything funny when missing ?

[cryogen]

Hello everybody! New to this forum but my g60 is doing exactly the SAME thing.

rev counter do anything funny when missing ?

Mine doesn't freak out. Alternator works fine.

Will changing the spark plugs with a +1 temp rating fix our problem. My g60 runs with the o2 sensor unplugged and with 68mm pulley.

[Simeon]

No, you shouldn't have to change spark plugs to fix a misfire issue. What spec is your engine? When you say it runs without the lambda do you mean all the time or its fine if you unplug it?

What have you replaced already?

[finsg60]

are you still using standard fuel pump? I had to change mine, but mines in a mk2 with the lift pump and pump under tank

[danny_p]

ummm   i would be suspecting hall sensor in dizzy  but that playing up causes the rev counter to spazz out ( usally )  me be worth chaging it anyway as it's often a temp related issue.  (0 they'll normaly work cold )

duff another cheep set of plugs in just to eliminate then as a potential issue 

[G601950cc]

Hi everyone, corrado G60 with mis-fire bought another co potentiometer drove lovely until it got to about 90 - 95 degrees oil temp driving mis-fire appeared again engine runs lumpy  once I can get engine to 3000 rpm and hold revs engine will mis-fire. However I have noticed its a timed mis-fire.
i.e. if you can ImagIne. vroom is the sound of a happy running engine, wot I get is....vroom, pop, pop, pop...vroom, pop, pop, pop.... vroom, pop, pop, pop... and so on. When engine has cooled car runs sweet. I have wondered about it being dizzy. Any thoughts would be appriciated

[G601950cc]

G60 mis-fire has been fixed, changed ecu relay, fuel pump relay, no fix.
Changed distributor for an original Bosch item from TPS. Retimed ignition all is fixed goes like fook now!