Escos misfire on boost. Update 8/06/12, it's still there!
31-05-2012, 02:23 PM
#1
Escos misfire on boost. Update 8/06/12, it's still there!
Hi guys I'm after some guidance as to what else to check on my Escort Cosworth since it has developed a misfire on boost. It is big turbo converted using a L8 Ecu and MSD chip.
So far I have replaced the coil to GrpA, replaced the sensor kit from Matt Lewis excluding crank sensor. I have also replaced the rotor arm,dizzy cap, 071 plugs gaped to .6 and i have a set of Motorsport leads on there way from MSD and should be here tomorrow.
The car starts, runs, drives off boost perfectly and will go gradually all the way through the revs with no hesitation or mis. The fault only occurs when hard on boost. Sometimes it seems better than than others. It never disappears completely though and has no relivence as to to weather the car is hot or cold.
A couple of times while the misfire has happened the rev counter jumps slightly but this doesn't happen all the time and the rev counter increases normally.
Any advice would be appreciated as I don't want to drive it untill it is 100 percent
So far I have replaced the coil to GrpA, replaced the sensor kit from Matt Lewis excluding crank sensor. I have also replaced the rotor arm,dizzy cap, 071 plugs gaped to .6 and i have a set of Motorsport leads on there way from MSD and should be here tomorrow.
The car starts, runs, drives off boost perfectly and will go gradually all the way through the revs with no hesitation or mis. The fault only occurs when hard on boost. Sometimes it seems better than than others. It never disappears completely though and has no relivence as to to weather the car is hot or cold.
A couple of times while the misfire has happened the rev counter jumps slightly but this doesn't happen all the time and the rev counter increases normally.
Any advice would be appreciated as I don't want to drive it untill it is 100 percent
Last edited by Nick.W; 08-06-2012 at 05:19 PM.
31-05-2012, 03:49 PM
#5
Yes I believe so Matt as one day the car was fine and then it started misfiring and hasn't stopped, so wasn't a gradual deterioration over time. The new phase is gapped to .2. I'll check the cps tmrw.
Last edited by Nick.W; 31-05-2012 at 03:50 PM.
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02-06-2012, 11:01 PM
#9
Not as yet, I am waiting to get my ecu and chip back from MSD which should be tues/weds. My existing chip was ancient and of unknown spec so I updated to my spec as par of the course.
My leads have arrived so will be trying them once the ecu arrives as well.
I'll keep the thread updated with progress.
My leads have arrived so will be trying them once the ecu arrives as well.
I'll keep the thread updated with progress.
Last edited by Nick.W; 02-06-2012 at 11:02 PM.
08-06-2012, 05:16 PM
#10
Update
I have now fitted my spanking set of leads from Matt Lewis and a proper chip from MSD tailored to my engine spec.
The misfire is still there
I have noticed as of today when the misfire occurs the rev counter jumps considerably and went right to the end of the rev counter on a couple of occasions. It feels like it is holding back also.
To date I have changed:
MSD Chip
Plugs 071's gapped to .6
Phase sensor
Motorsport leads
Sensor kit from Matt Lewis (excluding crank sensor)
Grp A coil
Dizzy cap
Rotor arm
I'm reconing my next stop is a crank sensor. By reading previous similar threads I am lead to believe this can be a cause Of the rev counter jumping?
Any input welcome!
I have now fitted my spanking set of leads from Matt Lewis and a proper chip from MSD tailored to my engine spec.
The misfire is still there
I have noticed as of today when the misfire occurs the rev counter jumps considerably and went right to the end of the rev counter on a couple of occasions. It feels like it is holding back also.
To date I have changed:
MSD Chip
Plugs 071's gapped to .6
Phase sensor
Motorsport leads
Sensor kit from Matt Lewis (excluding crank sensor)
Grp A coil
Dizzy cap
Rotor arm
I'm reconing my next stop is a crank sensor. By reading previous similar threads I am lead to believe this can be a cause Of the rev counter jumping?
Any input welcome!
Last edited by Nick.W; 09-06-2012 at 09:09 PM.
08-06-2012, 05:30 PM
#11
had this on a m8s sapp 4x4 it went to power engineering and he put an extra earth to the ecu not sure which pins but it cured the problem as your in soton if you have no joy with anything else you could prob pop over and i will get my m8 to pop over and check out his car
08-06-2012, 05:35 PM
#12
had this on a m8s sapp 4x4 it went to power engineering and he put an extra earth to the ecu not sure which pins but it cured the problem as your in soton if you have no joy with anything else you could prob pop over and i will get my m8 to pop over and check out his car
08-06-2012, 07:12 PM
#21
I notice you have not yet changed the crank sensor you seem to have bought everything else but this lol
it would have been easier just to read the ecu and ask it nicely what is wrong are we not feeling well today and it would have told you what it thought was wrong
it would have been easier just to read the ecu and ask it nicely what is wrong are we not feeling well today and it would have told you what it thought was wrong
08-06-2012, 09:12 PM
#25
I will change the CPS as par of the course. I dont hold much confidence in this sorting it though as I have just spoken to Turbosystems Tony and from what I can gather the cps is speed related. My Misfire is Load related.
08-06-2012, 09:44 PM
#26
Besides the cps,fuel filter maybe different plugs Ik's say.Maybe this http://shop.motorsport-developments....kit-1051-p.asp
What about the crank pulley,is that in good order.Cant think of anything else,you have already changed it all !.Give it to Tony
What about the crank pulley,is that in good order.Cant think of anything else,you have already changed it all !.Give it to Tony
Last edited by Rax; 08-06-2012 at 09:47 PM.
09-06-2012, 07:39 PM
#37
Nick i feel your pain my mates car has the same problem gets to 4k hesistates the goes thats on a P8(mine) fit his L8 and it won't rev past 4k all sensors are new also.
And get this it even bloody starts and runs WITHOUT the phase connected its bloody christine its going to start playing old 80's tunes next.
Paul
all sensors are new also.And get this it even bloody starts and runs WITHOUT the phase connected its bloody christine
its going to start playing old 80's tunes next.Paul
09-06-2012, 08:06 PM
#38
the l8 can start without the phase sensor it monitors battery voltage when cranking
it will after a while decide it can no longer compute correctly and shut down
The p8 is even smarter and has both limp home and error mask which can make it almost impossible to fix
The p8 has real time data stream as std which is ace
it will after a while decide it can no longer compute correctly and shut down
The p8 is even smarter and has both limp home and error mask which can make it almost impossible to fix
The p8 has real time data stream as std which is ace
09-06-2012, 08:57 PM
#39
the l8 can start without the phase sensor it monitors battery voltage when cranking
it will after a while decide it can no longer compute correctly and shut down
The p8 is even smarter and has both limp home and error mask which can make it almost impossible to fix
The p8 has real time data stream as std which is ace
it will after a while decide it can no longer compute correctly and shut down
The p8 is even smarter and has both limp home and error mask which can make it almost impossible to fix
The p8 has real time data stream as std which is ace
Tony mine is on coilpack and won't start without phase and dies when unplugged its that just how that system works?
Cheers
Paul
09-06-2012, 09:07 PM
#40
Nick i feel your pain my mates car has the same problem gets to 4k hesistates the goes thats on a P8(mine) fit his L8 and it won't rev past 4k all sensors are new also.
And get this it even bloody starts and runs WITHOUT the phase connected its bloody christine its going to start playing old 80's tunes next.
Paul
all sensors are new also.And get this it even bloody starts and runs WITHOUT the phase connected its bloody christine
its going to start playing old 80's tunes next.Paul
I hope your mate gets the right result in the very near future!