Parts Price Advise

[chunder]

I am thinking of ditching the standard ECU and AFM set up for a Motec or similar using a MAP sensor and was hoping to offset the cost by selling these items.

Nothing wrong with the originals - they are in GWO just that the engine spec has been changed, there is no-one out here who can reprogramme this ecu and I want to be able to drive fans etc and fit a stepper motor for proper idle control.

Before I embark on this process can anyone give me an idea of what they think a Jag AFM, ecu and loom and sensors from a 4.5 would be worth - not whether anyone would be interested in buying as I will put an ad in the parts for sale section - just an idea on price.

Is 300 too high ? Any opinions would be welcome.

[wedg1e]

I got a Jag AFM and 8 injectors for £80, and another Jag AFM for £18 off Ebay.
I built a new injection loom from scratch, cost me about £60 in parts alone.
Coolant temp sensor about £12 new, not sure about the throttle pot... £50? Don't need cold start valve or thermotime switch anyway on most V8s in the UK.
Injectors say a tenner each, but then you may be keeping them.
ECU...hmmm. I guess a lot of people would be reluctant to commit to this without some comeback if it didn't work. I have seen them go for less than £40, and full EFI systems with inlet manifold, plenum, ECU and all other bits for little more than a hundred.

So 300 MAY be a little steep, but you never know...

[paul gotts]

Exactly what I did a few years ago - although presumably Motec will be a lot cheaper in Aus. than here. I sold my loom, standard AFM and ECU for £100 or a little over , cant remember precisely now.

[dickymint]

Personally i would keep it untill you are 100% happy with new setup.........could turn out to be priceless!

[chunder]

paul gotts said:

Exactly what I did a few years ago - although presumably Motec will be a lot cheaper in Aus. than here. I sold my loom, standard AFM and ECU for £100 or a little over , cant remember precisely now.

Paul,

Was it worth it - how did the wiring go - where did you locate the air filter - did you convert from AFM to MAP and how did you control idle ?

It's actually a Haltech E6K I am thinking of fitting, primarily to liberate the horses I know are still there but also to get better control of idle and sequence the cooling fans.

[paul gotts]

chunder said:

paul gotts said: Exactly what I did a few years ago - although presumably Motec will be a lot cheaper in Aus. than here. I sold my loom, standard AFM and ECU for £100 or a little over , cant remember precisely now. Paul, Was it worth it - how did the wiring go - where did you locate the air filter - did you convert from AFM to MAP and how did you control idle ? It's actually a Haltech E6K I am thinking of fitting, primarily to liberate the horses I know are still there but also to get better control of idle and sequence the cooling fans.

I cant give you figures just on the benefit of the Motec, as I did not have the car tested before the change. However, it was running a flapper, which was unable to deal with the 4.3 lump fitted - to get it right at the top end it meant running too rich at the bottom / mid range. Fitting the Motec defintely gained BHP and driveability, and a c. 3 mpg improvement in fuel consumption. Depending on your annual mileage, you can work out how long the system will take to pay for itself. I had the loom purpose made, picking up the connections from the existing injectors, water temp and throttle pot sensors. The AFM was junked, and an ally boss to mount the air filter made up with a drilling for an air temp sensor. This boss then connects directly to the throttle body on the plenum with a 100mm id silicon hose, with a similarly sized boss welded onto the plenum. The existing thermo time switch, injector resistor pack and cold start injector are not used. A map sensor was fitted, with the manifold connection teed into the pipe from the over run valve to the adjustable fuel pressure regulator. As it was originally a flapper it had no stepper motor, so idle does fluctuate with load slightly. You can adjust the mixture through the ecu and the air bypass on the plenum still has some effect. I guess ambient temp. is more of a problem for your car than mine, although I have had my rad recored with 4 rows, and it also runs a fuel cooler to overcome any tendency to vapour lock through heat soak. Very pleased with the system.