Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[tigers_gonads]

Firstly its my bosses not mine 

Okay, Ford Focus RS (proper job Mountune 2.5 Volvo engine / suspension conversion / around 350 bhp  .)

It hadn't had a good run for a while so off it went for a good A / B road Italian tune-up 
The car drove perfectly for about 30 miles then started to have idling problems to the point that it would stall if you took your foot off the accelerator.
This happens whether hot or cold.
Its had a very basic code reader plugged in and has no faults codes stored 
No EML lights or anything 
Had a very brief look / listen for any air leaks ect but nothing.
Any ideas please ?

I'm looking to get hold of a laptop with live data for the weekend.
Personally i'm thinking MAF 
Anybody got a clue what the MAF readings should be at idle on a engine like this ?

TIA 

[razzo]

If he has ram air or cone air filter fitted the maf sensor needs to be around the 2 o’clock position, could also check the map sensor & o ring fitted near the throttle side of the inter cooler, if they get dirty they can sometimes be cleaned up

[tigers_gonads]

If he has ram air or cone air filter fitted the maf sensor needs to be around the 2 o’clock position, could also check the map sensor & o ring fitted near the throttle side of the inter cooler, if they get dirty they can sometimes be cleaned up

Got a picky somewhere
Give us a hour 

[tigers_gonads]

[tigers_gonads]

I believe its a K&N cone inside a custom box (but could be talking 'dangle berries') 

[razzo]

Maf looks ok but wouldn’t hurt to pull it and clean if needed, could also be worth checking fuel filter

[tigers_gonads]

Maf looks ok but wouldn’t hurt to pull it and clean if needed, could also be worth checking fuel filter

Can the MAF be cleaned safely ?

Funny enough, the plonker did run out of fuel a month ago.
He claims he has had the fuel filter changed since but .............

[razzo]

Had some success in cleaning both sensors with electrical contact cleaner, but both needed replacing in the end

[Marks DTM Calib]

Don't rule out coil packs and EGR

[razzo]

Looking at the pic, was this a diy build using mountune parts or did mountune carry out the work themselves?

[iansoutham]

I am more intrigued by the fact that it looks like an ST engine, not the RS.

Oil filter housing diaphragm is common on the 2.5 engine, causes air and boost leaks.

One way to double-check is to remove the dipstick and listen for air leaks into the crankcase area

[tigers_gonads]

A little bit of info for you all before I have a look at the machine over the weekend.

It would seem that it did indeed start out as a standard ST. 
All conversion work was carried out by Collins Motorsport, paid for by the previous owner from the Leeds / Bradford area.
This gentleman has very sadly passed away and the vehicle was sold onto my boss last year. 
He has a rolling road print out showing 348 bhp.

[Migv6 le Frog Fan]

Through the front wheels ? What a waste of horses. 

[tigers_gonads]

Through the front wheels ? What a waste of horses. 

That's what I thought until I had a play in it.
I've been sat in some fast cars over the years but I have only ever once been pushed into the drivers seat while hanging onto the steering wheel before and that was in a 300bhp DAX Rush 
As for going around corners, it just does ..............  at stupid speeds too 
Apparently it has some sort of trick diff (but don't ask me what it is) which basically just does as it says on the tin 
Very impressed imho

Shame about the 12 mpg around town 

[tigers_gonads]

Laptop plugged in
MAF was reading 1.3 @ Idle / 2.5 with revs on.
According to Dream Science ( a highly regarded ford modification place around here) it should have been between 2 and 7 at idle and upto 15 with revs.
Unplugged the MAF and it ran much better.
Lambda was switching okay.

So an new MAF ordered @ 160 sheckles (with a bit of discount)