codes 22 & 23 and other stuff!

[dapinky]

Having decided to spend the day doing stuff to the car (not been used since Donny) i came accross a few issues.

When putting the car into service mode, should the revs rise up to 1500ish?

Firstly, i decided to set the timing up, no problem, except the CEL came on before i could do it (does that matter for setting the base timing????)

I set up at 16 deg, then found the codes 22 and 23 in the system.

From what i can gather, this is TPS voltage low and Manifold temp too low.

Further search of this site lead me to find out that the MAT sensor and the TPS sensor share a common ground wire - is this likely to be the problem, or if not, what else should i do?

Bear in mind that the TPS came off the car when the head was done, and has only been put back 'by eye' to where it was before.

Next thing i noticed, when i was checking that it was up to temp, i had a hand on the expansion bottle and by moving it about, it caused the car to increase revs or stall.

What's that all about? Loose wires at the coil or what?

Lastly, the boost guage still goes straight up to max deflection when the ignition is on. i have replaced the connectors on the green wire with new / clean ones - and moved the black wire to a good earth - what's next???

Before someone tells me to stick elanscan on it to see whats wrong, bear in mind that although i have a laptop and cable, it is as yet untested with the car, and i wouldn't know what buttons to press on the computer yet anyway (playing with that was another job for this weekend!).

[paulwatkins]

Dave,
regarding the revs problem, I've read on here that mickmick had the same symptoms when he put his car into service mode. IIRC he adjusted the idle screw on the throttle body to bring it down to 950ish.

Maybe worth a search of his posts.

Paul

[dapinky]

Thanks Paul.

As a bit of an update, i'm sitting in the car at the moment - elanscan is up and running but i dont understand much of what it's telling me

The things i have noticed are that it tells me i have a fault with low TPS voltage and MAT (I knew that before!!!!!)

With the engine off, ignition on, there is no change from 0v on the TPS on elanscan, so i'm presuming that it's not sending anything to the ECU.

Ah well, better fiddle with some wires......

[GeoffSmith]

I've read on here that mickmick had the same symptoms when he put his car into service mode. IIRC he adjusted the idle screw on the throttle body to bring it down to 950ish

Spot on!

[GeoffSmith]

With the engine off, ignition on, there is no change from 0v on the TPS on elanscan, so i'm presuming that it's not sending anything to the ECU.

You should see something Dave, so sounds like a good starting point. Presumably you're seeing something back from other sensors e.g. coolant temperature?

[dapinky]

If the idle screw is that one which has a locknut on it and acts on the cam on the throttle cable, then it ain't gonna make any difference cos it aint touching anything!

I've wobbled the TPS about a bit, no difference!

elanscan says the MAT is reading about 61 deg C - what value should it have?

Ah well, back to the wires - where does the sensors earth wire go?

[dapinky]

Yes, the coolant and RPM are all reading okay

[GeoffSmith]

I'm just on my way to the garage to check a few more interfaces. Give me a buzz if you need to talk.