iguman

I buy p8 (i dont know is chip is standard, think is not) and put in my sapphire 4x4 green top.

Car is working but when i want to accelerate amal valve is ticking.

After few days idle dropped to 400-500 rpm!

when i put old L8 works fine. I dont what is happend...

Thanks

Pics of my P8

fraser9764

iTrader: (3)

base idle must be incorrectly set. Unplug the ISCV with the engine warm and set idle to 900 rpm

martysmartie

iTrader: (1)

Check the TPS output this would cause the problem you describe and also the Amal issue as well as well as causing havock elsewhere.

It's not the base idle, it cannot drop below this it can only be raised above it by air via the ISCV, coupled with the fact this would not have been changed!

Nope the chip is not standard, if in any doubt (The name does not sound familar over here) replace it BEFORE you destroy your engine!

Martin

iguman

everything work normal with L8,( I`m not shure about lambda sensor).

It is work with P8 on idle, except amal ticking on pressed throttle.

I dont know is this version of P8 have reset option or not,but sierra loom does not have memory re-set plug...

Some ideas?

martysmartie

iTrader: (1)

Like I say I would look at TPS, although this wouldn't have got changed, don't think a reset will resolve it but there is a specific procedure for doing so (It's on here)

Martin

fraser9764

iTrader: (3)

He says his idle is to low, ISCV and TPS calibration can only raise the idle speed not lower it

oldford

A L8 standard uses a 2-bar map-sensor.
A P8 standard uses a 2.5 bar map-sensor. This one? anybody's guess, but looks like a superchip with the board beneath the eprom. Could be 2.5 or even a 3-bar map sensor.

What map-sensor does your car have?

Yura

yes first of all you should know what the engine spec is chip for? I mean injectors, MAP etc

grcossie

Never use a chip, you don`t now what spec it is for. Can easily melt your engine

iguman

Problem is that car with P8 is work with normal idle and sudenly after few day idle drop. Map is standard cossy 2 bar.

Can be that something damaged in P8?

Yura

No, try to check error codes, lambda and idle control valve(if problems when engine cold).

s1cab

iTrader: (1)

what tps are you using..? don't forget that when you use a 'p8 ecu' the two outer wires on the throttle position sensor needs to be swaped around. your tps will be telling the ecu its fully open when its closed and shut when throttle is open.

oldford

s1cab, swapping the tps wires is not necessary. Ford allready did this for the L8.
iguman, stop using the P8, unless you want to damage the engine.

iguman

This p8 dont give error code, maybe becouse chip is custom..

I use standard 4x4 sapp TPS 09.

oldford I will not use it until i solve this problem

martysmartie

iTrader: (1)

Yes P8 and so Escos has a 2.5 BAR map sensor, so yours is certainly wrong, as the chip will either be mapped for standard or a higher MAP sensor.

The scales are totally different and so you need the correct MAP sensor as said, this is one of the main inputs and can destroy your engine as the ECU is receiving a false input!

You DON'T need to swap the wires, you only would do so if using L8/P8 on a 2WD loom!

Martin

oldford

I would not change the map-sensor for this Eprom.
Nothing is known. Is it for a 2.5 bar or a 3-bar map-sensor?
For which injectors is it intended? And which fuel pressure? 3.5 bar? 4 bar?
Is it intended for rally use and should there be a restrictor? And if so, how big? 32mm, 33mm, etc.

And then a question that intrigues me: why the P8? You're L8 seems to run fine.
What do you want?

martysmartie

iTrader: (1)

But OP will need to change MAP sensor regardless, seen as no P8 is going to have a calibration for the 2 bar item, given it was 2.5 to begin with (Unless you get a custom remap), but I totally agree with you re the chip, which I mentioned above.

Martin

iguman

P8 can do Wasted Spark without additional board, modern ECU, no O2 adjustment its automatic, addaptiv learning... Why not?

Yura

you need to buy proper P8 chip for your setup imo

Stu @ M Developments

iTrader: (12)

Guys, the p8 boost control valve is NOT the same as the P8 amal and they are not interchangable. The boost valve problem and the ticking are caused by both the map sensor and the wrong boost control valve, so those are simple fixes.

The idle issue, probably adaption caused by running the wrong map sensor. Get a decent chip in there and perform a hard reset to clear adapation values in ROM 2.

martysmartie

iTrader: (1)

Martin

cozmeister

iTrader: (1)

No, it's called a boost control solenoid, and is made by Lektron. It has two ports instead of three and operates at a higher frequency (100hz instead of 25hz if I remember my schooling).

martysmartie

iTrader: (1)

LOl the "Amal" is a boost control solenoid but it's known as that name as Amal are the company who made them in Sweden

IIRC I believe the FRST may have used the same valve?

Martin

iguman

Thank you all for help.

How can I hard resset P8 if sierra loom dont have reset plug like escort?

DaveCrack

iTrader: (1)

Thanks for pointing that out! Had the same problem with ticking ISCV on my 2WD when changing to P8. Not even thought about changing the boost/amal valve to the Escort one...