S Fuel Pump - Wrong one fitted!

MBlake · 04-02-2002, 11:46 PM

HELP - a bit long - sorry.....

My 2.4S runs okay, but has never run fantastically. I have alway thought the throttle response wasn't lightening like I had been promised, the car was running rich (and would puff out light grey 'fuel' smoke when accelerating through 4000rpm for the first time). Also, although it would start first time, it wouldn't idle, and would usually die with the first touch of the throttle.

I wasn't brave enough to tackle this myself, and took the car to a specialist. They tried to improve the fuelling, but said that problem was with the fuel metering unit (it couldn't be adjusted down low enough), and recommended that the unit be re-built.

I waited a while due to finances, but took the plunge a couple of weeks back to get the fuel unit rebuilt (the car was taken to the same specialist, who subsequently sent the pump away for rebuild).

I got the call back this morning to say that the pump isn't from a 2.4, but actually a 2.2 (I believe it is from an S), and that it has been set up for a 2.7. They say that they will be able to adjust the settings to suit a 2.4.

From the engine numbers, the motor is definately a 2.4S, and there is little to suggest that the rest of it has been played around with (except a large front (behind bumper) mounted oil cooler), but it raises the following questions

1) It is possible (though unlikely) that the engine has been increased to a 2.7 - Would I able to check this without taking the head off?
2) Assuming the motor is a 2.4, do you think that the 2.2 pump will be able to be set to do the job properly?

At the moment, my feeling is that I need a fuel pump, and at least the 2.2 unit will be rebuilt and set to my motor. Unless I act quickly, I guess I am also going to be paying for this work (maybe already too late). Using this pump will improve on the previous performance, and may be preferable to buying a 2nd hand 2.4S unit that may have been played around with, and hence also require rebuilding. What do you think.....

BK911 · BK911's Garage

Personally I wouldn't spend any money until I was POSITIVE what I had. Even if that meant dropping the engine. Not sure how to verify existing conditions without at least a partial dis-assembly. Others may know. On the bright side, a 2.2S MFI pump is worth some coin. Should help offset some cash output.

Good luck!
BK

edit: I don't think a 2.2 MFI pump can be calibrated for a 2.4 or 2.7 application. Again, others may know for sure.

Early_S_Man · 04-03-2002, 06:24 AM

Marcus,

Yes, you can tell whether your cylinders are the Biral 2.4 or Nikasil ... just by looking at the fin pattern on the underside of the engine! There are radial 'gaps' in the cylinder fins at the 0°/360° , 90°, 180°, and 270° positions of Biral 2.4 cylinders ... whereas RS 2.7 Nikasil fins are continuous around the entire 360° circumfrence of the fins!

MBlake · 07:52 AM

Warren,
That is a fantastic bit of trivia! I will get the workshop to check this...

BK
I have confirmed that it is 2.2S unit. The rebuilder reckons that it will be slightly compromised, but they can alter the settings for the 2.4S. The workshop has faith in these guys, and have used them a lot for MFI work.

Provided the motor is still a 2.4 (I hope it is - that means that a 2.7 rebuild would be available to me if I ever won the lottery...) I reckon my best option will be to wait and see how good the 2.2S pump will be.

Thanks Guys

04-03-2002, 03:07 PM

Look under the car at the number of cooling fins. The 2.7 RS cylinder has less than the 2.4. I will check the number when I get home.

gator70 · 04-03-2002, 11:05 PM

Carlos,

I know of a good 2.4S pump. And I need a 2.2s pump. Are you interested?

I was considering buying this 2.4S pump and have it calibrated to work on my 2.2S.

MBlake · 04-04-2002, 12:26 AM

Update on engine -it is a 2.4 - thanks

***************8

Gator,

Sounds interesting. However, here is the rub! I am based in the UK, and I am guessing that you are in the US.

Am not sure what a fair price for a 2.4S pump is, or for my rebuilt and recallibrated 2.2S pump.

Send me another private mail with your location, and the sort of money you have in mind....

I am only a few days away from getting this pump back on the car and fitted - I would like to defer a decision on whether I am interested in changing once the car is back and running.