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Biggleswade, Letchworth, Royston.
A couple of head-scratchers that needed to resolved…
Up bright and early to head to Biggleswade, yesterday morning, to see Barry’s TF 135 that had previously been investigated elsewhere for a possible fuel pump issue. (Please see blog dated 13 November for our previous investigations). We took back with us another fuel pump (thanks to Mr Bell for supplying) and fitted this, still no joy, so investigations continued. A little strange as last time all power and grounds were found to be good, however, when testing them again, this time, there was a lack of ground to power the relay. All wiring therefore stripped back to try and find a break, traced the ground wire back to the ECU, where it was found to be a poor connection to the ECU, rather than a break in the wire.
Once this was sorted the car fired into life, barring the fact that it now had a flat battery. We checked the alternator that it was supplying the correct output and that was all good. All wiring taped up and put back as it should be.
Really great to have all this sorted for Barry, finally, he can look forward to getting out in it again.
It would have been bit of a schlep to go back home, plus we didn’t know how long everything would take, so we stayed over in Letchworth for the night, which is an interesting place.
From our digs, we headed back over to Royston this morning to see Jonathan’s MGF that we’d also seen on our November trip. Whilst the car had been sat on the drive it appeared to be running fine, following everything we carried out, only for Jonathan to get back in touch to say the problem had recurred.
We took along with us today a new map sensor and fitted this, after a test drive it was still playing up, but without cutting out as often this time. Just to make sure there were no air leaks we replaced the inlet manifold gasket. On further diagnosis it could now only be down to the wiring, or down to the ECU. The wiring connectors were all sprayed and cleaned, Jonathan had a spare ECU that the previous mechanic couldn’t code to the car, we managed to code this to the car, which instantly eradicated the fluctuating tic-over. On a further test drive car found to be running smoothly with no stalling or fluctuations, result!
So all in all a successful couple of mornings, just a shame that we couldn’t fit either of them in initially, but so glad to have resolved these rather protracted issues for the owners.
Here we are, it’s the weekend again, thermals at the ready! Have a good one everyone near and far. 🥶 – https://ift.tt/kBEoUXr