whats this in my ginnel

[Brian (up north) Morris]

just found this in my ginnel behind my melos. i think someone has droped in their with a chopper :-)

[Brian (up north) Morris]

t.p.s. even 

[James Doulton]

The pipe that you disconnected is the fuel pressure regulator which maintains the fuel pressure as a fixed pressure with respect to the intake pressure - when the throttle closes then there is lower pressure in the inlet and that valve reduces the fuel pressure so that the pressure difference across the injectors remains constant. Keeping that pressure difference constant means that the ECU only needs a simple table of values to convert the calculated fuel need into the injector opening period.

The wires that you have removed go to the throttle position sensor (TPS) which is just a potentiometer. The following table shows the various control programs of your ECU and most of them use the TPS. I don't know exactly how the input is used in the control system but typically it is used to detect Wide Open Throttle (WOT) or nearly WOT which changes the program from giving an efficient fuel mixture into a rich mixture for maximum power. It is also used to detect when the throttle is closed which can prompt the system to cut the fuel completely (I don't think yours does this). It is also used to detect the throttle being opened quickly, which requires a temporary increase in fuel supply to offset the lag in the MAF and to increase the fuel on the walls of the inlet port.

I don't know how the system behaves when it detects that the TPS is disconnected but it probably adopts a "limp home mode". That might remove the hesitation but I doubt that it improves the general operation.

[Adrian Southgate]

Sorry Bri, I could be wrong about the idle control valve... thats the tube thing in the top of your photo... (which is what I thought you meant when you said you had disconnected it)

[Brian (up north) Morris]

its fine im pretty sure ist the throttle position sensor.   for now lol

[James Doulton]

That table is for a later version of the 'same' ECU. The EEC-IV was used for all of the EFI Pintos and the EFI Cologne V6's and even a few Zetec-E models. The abbreviations are:

ACT = Air Charge Temp
BV = Battery Voltage
DPFE = Differential Pressure Feedback EGR
ECT = Engine Coolant Temp
EGR = Exhaust Gas Recirculation
KS = Knock Sensor
MAF = Mass Air Flow
MAP = Manifold Air Pressure
NDS = Neutral/Drive Switch
PIP = Profile Ignition Pickup
SS = Starter Sense
TPS = Throttle Position Sensor

[Brian (up north) Morris]

thanks james

[rob saul]

Are you still running an standard unbaffled escort van tank ?
How much fuel have you got in the tank ?
Might be fuel supply affecting everything

[Brian (up north) Morris]

yes rob standard mk1 tank. but it ran for years with this tank. why would it be any different now...?   its got £25 in the tank. thanks 

[Brian (up north) Morris]

well iv just had it out for a run with the t.c.s. disconected and it runs like a dream. so disconected it stays . job done.

[Steve Kerswell]

[Brian (up north) Morris]

this is the little pig :-)

[Paul Sheridan]

I would recommend you replace it Brian, It may seem to run ok with out it, but the ECU will rely on it to make adjustments at certain points throughout the map.