bosch or lucas ??

[uglymug]

How many of you have got Bosch relays fitted and how many of you have Lucas relays fitted. I find there is a lot of contradiction in some of the maintenance files I am looking thru. I still can't start the 350i after having pulled everything apart. New diode pack and Bosch relays and the ECU being checked and given the all clear by the ECU Doctor. I think I have narrowed it down to no power to the ECU ( term 10 on the plug ). Is there a way of hot wiring this to see if this is the problem.
I have had the resistor pack checked and the air-flow meter checked - all good!
PLEASE HELP GUYS AS TIME IS RUNNING OUT - THE LONG SUMMER DAYS ARE GETTING CLOSER AND I NEED TO BE OUT WEDGING, NOT STUCK IN THE GARAGE !!!!

[dickymint]

Sorry to hear its still not going. Did you manage to find the "red relay" (sometimes reffered to as steering module)? you've not accidently replaced it with a proper relay?
The red relay will be a five pin type (from memory)

[shpub]

This isn't the immobiliser playing up and not providing power to the ECU?

[Boosted LS1]

Ah, Lucas, prince of darkness. Ask any american

boosted.

[uglymug]

all,
Have changed the relay to a proper red relay and put in Bosch relays as stated in some of the maintenance files. I dont think there is an immobiliser fitted, but if there is one what will it look like and where is it. Also suggested a while ago was an inertia switch, agiain what and where is it. As I have never had a TVR before or ever seen another one in the flesh as they say, I am still working blind. There are one or two things that have been cut/missing so I am only going on info at the moment.
Last night I took the air-flow meter apart and the ignition amplifier. Does anyone have any electrical values ( ohms etc ) that I can transfer to mine to see if its one of these.
Its getting to the point where I might have to take it to a proper TVR garage to get it up and running- god forbid! Are any of you local to Caerphilly as I could visit and look and take notes etc..................thanks in anticipation

[dickymint]

Was thinking of popping over to see you - hopefully this weekend - will confirm this later in the week.

Maybe MikeB could make it also? (will mail him).

[rus wood]

From the BL Service EFi Product training workbook (1982) describing the EPiTest tests.

This is from the book and may not cover more recent or modified units. Most values seem to match with my 390.

Initial Flap circuit from 10 and 20 on the multiplug (control unit) via relay (pin 2) to pins labelled 36 and 39 on the flap unit plug.

Pin 10 is + 12, runs through to pin 39. Pin 36 connects to relay and on to 20.

With flap closed (ignition on) pin 20 should read 0v, the relay and fuel pump should be off.

Wit flap open pin 20 should go to +12v, the relay should energise and the fuel pump should run (audible).

Metering Circuit connects pins 7, 8 on the flow meter to pins 7, 8 on the ECU. Resistance reading should be 0.4 to 3 Rx (I think Rx = Ohms). Swing should be smooth with no open or short circuits.

Also 8, 9, 6 (the middle 3) are connected to 8, 9 and 6 on the ECU, the values given are 1-10 Rx (Primary Circuit) and 0-5 to 5 RX (secondary circuit). This test doesn't say anything about wiggling the flap.

The air temperature sensor is on 27 and 6. -10C Rx = 9.2, 0C Rx = 5.9, 10C Rx = 3.7. Bible says -10C = 9200 ohms, 0C=5,900 ohms.

The actual values amy be multiples of Ohms - the EPiTest hides this.

There are fewer than 39 connectors on the flowmeter plug but this is the way the pins are labelled in the book to match the ECU connectors.

Look at the plug face on with two notches out at the top and three notches out at the bottom (Buenos notches segnorita!). The pins appear to be labelled: -

27 7 8 9 6 36 39


I have just read it again and it is confusing - better read what is in the Wedge Bible - Steve is better at writing than I am.