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[swordfish]

Hi  i have a 3.0 elite x reg . the problem is that every 20 to 30 mile it starts to miss and cuts out . if you turn off and leave for 5 mins it starts fine again .or if you just keep restarting it it starts and cuts out again . its had a new icv and elite pete has checked for air leaks

[Elite Pete]

Releasing the fuel filler cap seemed to make a difference or it didn't cut out when I undid the cap every 5 minutes

[albitz]

Blocked fuel tank breather ? or the usual suspects - crank sensor,or dispack ?

[swordfish]

ok .first i will try it without the fuel cap on see what happens cheers . carl

[swordfish]

 OK . no look with removing the fuel cap it still does it . but i was on the motorway today and it started again; but it would not cut out because i had constant revs .but it was missing bad so i pulled off and it cut out .tried to restart it started but with a puff of smoke and you could smell the cats real bad [ rotten egg smell] so i think the cats got real hot because of the timing  with the  coil packs playing up . it then drove like normal again all the way home so i think it could well be the coil packs  what do you think  cheers  carl

[albitz]

Check for fault codes (pedal trick),pull plug leads and check for oil in the plug wells.

[swordfish]

its a 2000 3.0 l elite. i thought that was the paper clip test

[berserkerboy]

I had similar issues with my 2.0 16v. It was very annoying and a worry on major roads. Turned out to be the crank sensor. The wires at the sensor end had become bare and were touching each other giving confusing signals to the ecu. Replaced and car working well again. You need to get the codes.

[TheBoy]

its a 2000 3.0 l elite. i thought that was the paper clip test

Yup, do a paperclip test

[swordfish]

 OK done paper clip test. results
                                 
                                        74 [mass air flow sensor voltage high]
                                       
                                        89 [02 sensor 2 open circuit ]

                                        13 [ 02 sensor 1 open circuit]

                                        31 [ no engine rpm signal]    engine was not running during test

                                                   

[kcl]

My money goes on MAF 

[swordfish]

whats  MAF   

[tunnie]

Mass Air Flow sensor

[swordfish]

 thanks .anybody got one for sale

[albitz]

Yes. Will send you a PM. I will try and find a pic of one to send you,then try unplugging the electrical plug to yours.If yours is faulty,the car may run better with it unplugged as the ECU will use a default setting rather than the faulty signal froma damaged MAF. This would confirm yours is faulty,although the fault code has probably already done that tbh.