Car Ecu Reading 24 Psi On Idle

[neo]

I have had my engine rebuilt and had to replace engine harnis that plugs into the ecu and coils ect. we found when we took the engine out my original one was burnt at the back of the head with the VVCT connects and also up front ware the cams are the clip was broken and not connected he said the clips were broken before they got the car. even though the harnis was like that the car was running fine before the rebuilt.

now I have a new block and springs and engine harnis all but in connected the engine runs and I was about to get my car back. got a call and was told by the mechanic that when the car comes on boost it runs like a pig. he said that there is a map sensor issue that is telling the ecu that it has 24psi and the it come on boost it boost cuts.

the car is BA 03 Auto and its got a hi flow car as my cat fell in I told him that it will boost cut up top and that I will need to get it a tune some time. he said that's not the issue. and he had to replaced the map in the intake. got a call back and he said its been replaced and that its still conning up with the 24psi and he will have to drill the cover off the ECU and Check the signals.

I think this is drastic at will be fronting the cost for them to mess with the ecu wires as its not covered by warranty. I called the mechanic on Friday arvo and left a message to check the boost solenoid. a mate of mine told me that there is a second map sensor in the intercooler that he may not know about but it was past 5pm and no one was there. come monday im going to call him and tell him about the second sensor.

but if both map sensors are replaced and it still comes up with 24psi should I let him mess with the ECU wires? if not want should I do?

[ETM]

Sounds like the signal from the map sensor has been reversed somehow. Was there any cutting of wires involved? Do you have the old harness that you can use to cross reference the signals?

[neo]

Yes they cut one so I'll have to check. Ware is the second map sensor it in the cooler or outside

[Mike XR6T]

on the under battery pipe mate just behind the drivers headlight.

dont let him I <3 Bananas the ecu. u DONT have to open the ecu to check the signals going to it, sounds like he has no idea. any signal can be checked at the ecu harness connectors. id suspects he has over looked something and wouldnt let him rush into replacing sensors that where ok before

goodluck

[neo]

yeah im gonna be carefull he thinks that there is a shorted wire so ill keep u guys posted

Edited 31/05/09 12:36 PM by neo

[Adam]

I'd be taking the car to a dealer who has experience with these things.

[neo]

He seams to know what he is talking about. I called him told him and he was not to impressed. So I'm gonna call racq inshurance becauce they seem to put my car aside then to other cars. Mite have to get ford to look at the map error

[neo]

ok got my car back all the map sensors and the boost sol was replaced. and a waste gate vaulve was checked to see if it opens. got VCM on the car running and it made 15psi and its stock with hiflow cat and centure muffler. is it possible the car could make so much more boost with the hi flow cat. also checked my tune vs an 04 4 sp turbo like mine and tune came up the same im out of ideas what this could be.

[millers]

just to clarify VCM Scanner reports 17psi at 3100rpm before it cuts out. engine has just got a new bottom end (apparently BA spec) within the last 1000km.

is it even possible to be making that much boost at 3100rpm with with stock plenum and all stock intake piping/cooler?

there is a boost gauge in the car that apparently hasnt been reconnected since the engine went back in. that will have to be the next thing to check