it is an internitent fault in that just happens every now and then

been told i have a sensor down but was hoping somoe one else could help out

the car doesnt boost right (12 psi) and at 4k youo get such a bad misfire (consatntly) that it feels like car going to shake to bits

but....

if i turn of and turn back on (reset in theory) it clears

been told there is a engine check poinit at 4k

any help[ appreciated, cheers

 

sell it

 

Hi andy

Ive just this weekend had something very similar happen to mine but not in the turn off then turn on sense.

Mine was only boosting half way round the top section in the middle of the gauge instead of right round to the broken lines, got to about 3.5k - 4k and was missing like mad.... Turns out my actuator wasnt set up right it was running 12 psi and holding 8, it now runs 18psi and holds 17. the damn thing had been superb previously for a good 2 months......weird thing is i hadnt touched a thing under the bonnet (dont you just love cossies)!!! it just went....wouldnt mind but its only been on about 6 weeks as was brand new forge -31

Hope you get it sorted out Andy.

Twinny - there more chance of Andy winning the euromillions than him selling his car of that im quite sure!!!

 

The point is you reset the autodiag system when you switch the car off.
that's why it can be 'fine' after but if your ECU goes in limp mode it means that you have sensor failure somewere!
the best way would be to read the default code from the ecu when your stuck @ 4KRPM before stoping the engine
you'll find everything over here to do it (you just need a led, a 1Kohm resitor and a piece of wire)
Or you go to your nearest ford dealer when the car is mad but I would advice to go there and warn them before reading the codes will only take a couple a minutes for someone who knows..

 

Andy, ring me tomorrow evening.

 

where do I look for this diagnosticplug in my Escort?? I have been looking everywhere... I allmost beganlooking in the boot!!!!!

 

Have you had the multiplug down by the front wing (near the coil) sorted? Mine did exactly the same, we changed every sensor!

Wasnt till Ahmed had it idling on his laptop that they noticed it was the wiring making it go into limp mode.......... Mark was fucking around under the bonnet as Ahmed was checking his laptop!

July1 - where is ths diagnostic port then? and how comes no one else ever checks them................ As you make it sound like a common place to check.

 

the good old multiplugs that join the car loom to the engine loom are shouting out - have these been chopped out and soldered yet - if not, they need doing - they cause ALL sorts of wierd things to go wrong

 

Why are you mad about me???? I'm trying to help if you're ignorant it's not my fault!

The diag plug is located under the left strut reinforcement bracket (at least on LHD cars so you may have to look on the right side too)
so under your bonnet between the left damper top and the wing
you'll find 3 plugs: one for the diag, one to reset the ECU and one for the ABS diag.
to one your looking for has 5 holes with only 3 wires (black with black cover)
the one on top has to be connected to the - of the led and you'll have to connect the 2 at the bottom together..
let me know one you've found if you don't I'll post a pic for you

 

sorry mate.. it was not my entention to seam mad, just coldnt find this plug!! BUT you have put some light in to it and I will have a look when the arrives.

As you see.. I am danish and drive LHD, so it should be possible to follow your describsion.. I hope

 

Twinny not going too, but i have copnsidered it buy something else

redrsmk5 it not a Actuator probb mate as it boosts fine majority of the time, just has this intermiten fault

Franco tthank you, much appreciated

cheers everyone,

bborrowinng daz c's code reader tonight, hopefully get an aansswwer

 

very simple.
Its seeing an ecu input error, likely open circuit and is activating the secondary security rev limiter at 4000rpm. It is NOT a missfire its a revlimiter, thats why you cant drive through it...

 

hi all
i am very interested by this subject and i would like if possible to have more informations concerning this issue, i have the same problem but i check out all sensors and seem in perfect order ,i changed the air temperature sensor ,the map sensor , but the problem still alive ,i used the led auto diag but the eprom has been changed and the auto diag reported code error 43 , did someone know how to disable the limp mode, or can i use a L8 ECU just to check if the problem is coming from my P8 ecu
many thanks for help

 

Le limp mode et "reseté" ŕ chaque fois que tu coupes le contact mais si ta panne est toujours presente il se bloc immediatement pr te sauver la mise

43 signifie erreur interne si tu as une EPROM autre que celle d'origine c'est normal, sinon c'est probablement ton ECU qui ŕ un soucis.
Si tu as un L8 en version cata tu dois pouvoir le brancher pr test. (a condition que son EPROM corresponde ŕ ta config actuelle...)

 

merci jyli1
reste plus qu'a trouver un L8 afin de verifier qu'est qui ne va pas

 

also having the same problem at the mo,have changed the multi-plug and it made it a bit better now just every time i start from cold it goes into limp mode,turn it off then on no problems annoying the f**king bejesus out of me

 

Honestly get yourself a SECS monitor for Christmas
not THAT expensive and every time your switch on you can check ACT, ECT, as well as TPS and MAP is those are fine it only remain the Hego sensor (I personally also have an AFR meter to check it)
It can help a lot to find problems like yours
Another solution is your EPROM support DataStream is to buy (or borrow) a Pectel or Powerchip monitor and see what you can find.

Or maybe book your car to MSD or any good company to make your engine management checked by professionals

 

cheers stu, hoping me and darren can get to the bottom of it tonight

thankk you everyone else

 

did you sort it mate?????????

 

big-dirty-dog

not yet

the code reader did not pick up aanything, even though the fault was
happpening, after rough manual diagnostics LOL

bought a throttle position sensor so hoping that will cure it

 

what chip are u running?

some chips dont have the built in diagnostic, so wont actually report a fault IF there is one, you could do with swapping ecus or chip with one with a std chip or onw with diag readout enabled...

possible faults that will lock it in 4K LIMIT:

ECT
ACT
Lambda
MAP


dont think TPS does IIRC, as long as it IS giving a reading... but if it revs up, i suspect it is so would be easy to rule out.

lanmda probe connection is a favourite, as is the multi plugs if they havnt been choped out...

 

Dave Henshall

its a MSD chip mate,

it has started to rev funny, when the TPS is diisconnected

some more work will be done, to find the problem

i will spk to my mate about it hopefully, he is very good and i hope
he can help (hi daz)

 

If you don't sort it, I'll come round one weekend with my shit and technical information etc.

 

You chaps still messing with this small issue?

 

[quote="AJC"]Dave Henshall

it has started to rev funny, when the TPS is diisconnected

quote]

it will do,, the air is getting in, to allow the engine to rev, but the ecu wont know how to fuel and will be all over, the place - which sounds like it is doing, hence i'd say the TPS is ok.

pretty sure stus chips do have the diag codes, not too sure if they are the same as the ford ones though...? stu?

 

Stu can do both but I guess the datastream is enable by defaut so you probably have lost the autodiag feature.. best to ask him what's on your chip.

 

cheers troops, but this talk getting to technical for me

timee to call in thee calvary i think

 

im sooo glad it aint just me who is getting totaly lost with the tech talk
i might just start mine up from cold till its warm then turn it off and back on again from the rest of the time i own it

 

big-dirty-dog

when i sort the problem, i will leet you know

 

Would need teh chips serial number to tell you what protocol it contains.

 

http://www.motorsport-developments.c...iawmonitor.htm

that will sort you out

 

Only "If" He has a datastream, which isnt guaranteed on a P8, infact it is unlikely, not to mention the fact that his ecu's serial chip wont be modified either.

 

get the lot done for him then - he's only just down the road

 

Happy to help.

 

would love to be able to send it to MSD to get sorted as i dont have to ask daz to help me again or get my hands dirty,

but witht he car having limited use and not being used due to bad weather
im in no rush to fix it

it might end up there, i dont know yet,

 

Have you sorted the multi plug yet??

 

Take it to a garage, it'll probably be ok the whole time it's there, then when you get it back it will reoccur.

 

C.Lyon that's where the IAW Monitor software comes in. You can run it all the time and do a datalog to see what went wrong afterwards

 

What ever that is, it sounds cool

 

not sorted yet franco, not a big issue at the moment, really busy with other things, will be looking at it, once i get time