Good morning!

I emailed you back when I got your email, does that mean I've been naughty an all!!

Remove the MAP vaccuum pipe from the MAP and blow it through to clear any blockages, but make sure you do actually remove it from the MAP else when you blow it through you'll damage it.

If you actually removed the pipe rather than the electrical connector to disable the MAP, then you should have removed it from the MAP sensor and then plugged it to stop air being taken into the induction system through the MAP pipe.

Check the ignition dwell. You can do this at the coil negative terminal with a dwell meter. If, as you say, there is a good strong spark then it could be dwelling too long.

Remove the fuel filler cap the next time the problem occurs and then see if it cures it. If so then you simply have a blocked tank vent.

I know you say that the TPS has low resistance at WOT, but have you checked the voltages through the whole throttle range? Its easier to check voltages than resistances coz you can earth one lead of your meter to the battery and just leave it there which gives you an extra hand to wangle wires around and stuff. If I am not mistaken, the output wire on the TPS should have a range of 0.5 volts to 4.5 volts or thereabouts, but once the problem is apparent it may well jump around, indicating a fault with the sensor.

When the problem occurs, check the coolant temp sensor resistance. I think at normal operating temp the resistance should be somewhere between 200 and 250 ohms on average, but it may well be completely different whilst the problem is apparent.

You'll manage eventually. Just keep soldiering.

Best wishes and good luck

Geordie

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