143 replies to this topic

[Sutol]

The more i think about it the more I think is MAP related.

[CHILL Gone DUTCH]

The more i think about it the more I think is MAP related.

if its none of the stuff previously mentioned i agree

[Dan r]

That was my first thought, however I have replaced the map sensor with a spare from Martin and didn't make any difference at all, wires all buzzed out to ecu OK as well. Chill could I email a photo to you as I haven't got my head around posting pics up yet? Pm me your email please. Plug looks as expected to me but would be good for more experienced eyes to look at it. Thanks

[CHILL Gone DUTCH]

pm sent but you need to photo all of them to see if its only one cylinder or all 4

[Dan r]

They all look the same, will email in a minute. Thanks

[CHILL Gone DUTCH]

[Dan r]

Thanks for doing that, any thoughts?

[CHILL Gone DUTCH]

ccan you take apic so we can see the gap

[haggi961]

The more i think about it the more I think is MAP related.

The car going into limp mode is normally not caused by the MAP sensor as the OEM software can handle a maxed out MAP sensor without going into limp mode.

[Dan r]

It doesn't go into limp home, it misfires badly under load at around 3500rpm (more noticeable the higher the load) then runs rough until the engine rpm drops near to idle, then runs fine until back up to 3500rpm. Won't hurt getting a brand new map sensor to try I suppose as it does keep pointing at that. Can anyone say if a value of 14 is in the right area for the map channel at full load about 3500rpm? The data from the map sensor stays stable when it misfires if I hold it there for a second which I did this morning.

[CHILL Gone DUTCH]

when we said map issue before 

 

we meant to say the mapping of the car not the map sensor 

[Dan r]

Gotcha! Something may be a miss with the ecu to have lost part of a map or something maybe, Paul said something similar has happened before so will chat to jon at Courtenay's tomorrow about that possibility

[Dan r]

Spoke to Jon today and he recommended putting my coil pack on another vehicle to rule it out as there's a slim chance the one I tested of Chris's which was a spare could be faulty and it completely rules it out. Also going to check the injector connectors. I forgot to ask if the spare ecu you have would work Chris, can anyone else say if an ecu with a base cs map for sc with the larger throttle would work on mine which has the standard z22se throttle? I'd assume not from what I've read?? Thanks again all. Dan

[techieboy]

can anyone else say if an ecu with a base cs map for sc with the larger throttle would work on mine which has the standard z22se throttle? I'd assume not from what I've read??  

 

No it won't. Not just the calibration that is different but it's physically wired differently too.

[Nev]

Something may be a miss with the ecu to have lost part of a map or something maybe, Paul said something similar has happened before

 

 

Whaaaaat ?!

 

Are you saying your ECU EPROM (or whatever they are nowadays) simply allows their data to be changed or reset to 00s all on their own accord??  

Edited by Nev, 06 June 2016 - 08:51 PM.

[Dan r]

Paul thought something like that may have happened before but after talking to jon it doesn't sound like it can, so was a bit of a long shot / guess!! Thanks for the info on the throttle body.

[CHILL Gone DUTCH]

What throttle body was the car mapped on

[Dan r]

The standard z22se one. I still haven't tried a replacement yet, am I right in thinking opcom could find a fault with this by sending a signal and checking the return? Might buy one as only have scanguage which shows a stable throttle position wherever its at and when the misfire occurs. Thanks Dan

[Dan r]

Pretty sure I've found the problem! I removed the injectors and cleaned up the connectors as two of them were quite corroded, put it back together and it idled pretty rough so buzzed the injector wiring out and all seemed OK. Still ran rough again but after prodding the loom around injector 1 the engine hesitated slightly, so i stripped the wiring back and felt a broken wire underneath the shrink wrap where it had been soldered together. Annoyingly it was soldered right next to the connector and has snapped off even closer so haven't got enough wire to work with. Off to eBay for a new one now and hopefully it'll be all good again!

[PaulCP]

Fingers crossed 👍