FORScan forum

Ford Transit engine 2.2 130HP 2008 FORScan 2.3.63
Hello, After having installed 4 refurbished injectors and a new pump (hopefully genuine) I could recode injectors and start the engine.
Then I launched the pump learning service. Everything whent fine till 46% when the message installation error poped up due to intermitent problem on fuel pressure sensor short circuit to Vbat.
Using FORscan oscilloscope I checked / compared pressure measured VS expected pressure. The pressure signal looks OK, it matches the desired value with a little bit of noise.
Some others experienced the same issue shared on internet but I have not found any happy end with this issue fixed.
Does anyone know what to do in such a case?
Thanks in advance

if i remember rightly I've had this issue before. it was because i was running service procedures in wrong order. have you tried running pilot learn first then pump learn?

Thanks for your quick reply.
I did not run "pilot run" before launching the pump learning service. I will do it today and post the outcome.

Back again. ForScan 2.3.63 recommends to run pump learning prior pilot learn. However I ran pilot learn service succesfully but I am still having the same issue at 46% saying that the rail pressure sensor should be shorted intermitently to Vbatt. I checked the wiring carefully and monitored the output with an oscilloscope. Forscan and oscilloscope shows the same curve. I am now convinced that the issue is somewhere else but the mystery remains...
Any idea will be welcome.

Here is a short update of my investigations:
Wiring is OK:
- continuity <10 milliohms from sensor to ECU (all pins)
- insulation > 10 MegOhm from wire to wire , wire to ground, wire to Vbat,
Signal quality measure with an oscilloscope:
- Dc voltage at the sensor output= 1.35 V at idle
- AC noise +- 30mV peak
Enenthough the noise level seems to me beeing acceptable I decided to reduce it by inserting a first order filter.
- The noise went down to +- 15 mV peak which is OK in this environment.
Without really believing it, I started again the pump learn service. Unfortunately it failed again at 46% with the same error message.

After conduction all these investigations and reading many posts on the internet reporting the same problem without finding the solution I am thinking about a bug in Forscan or, at least a mistake in the reason of the abortion.

Since the engine is running fine I give up for the moment and stay with a temporary status with the pump learn.
I am stil interested in any new idea...

sorry for delayed reply i don't get on here very often. think i had one a while back that failed due to a faulty MAF sensor. no fault codes for the MAF just readings weren't quite accurate. also have you considered the fuel temp sensor? id check the data to see if its reading something reasonably close to ambient at cold start. also id check that the fuel pressure is close to the desired pressure. if the rail pressure is bouncing up and down like a yoyo then my money would be on faulty suction control valve they are a relatively common failure. the van hasn't been re-mapped has it? see bad re-maps causing issues with diagnostics and service functions all the time.