It's been a busy two and a half months since I finally got the turbo back from the body shop, but sadly things have not gone as well as I had hoped, so I thought it was time for a bit of an update.

Prior to the eight months my turbo was off the road for repairs, it was running a treat, but unfortunately since it's return I seem to have been plagued with a series of minor issues, some of which are still outstanding.

First the battery gave up the ghost, and had to be replaced.

Unfortunately I don't think the body shop kept it charged, and just gave it a quick boost whenever they needed to move the car.

Then the reversing light switch packed up and had to be replaced.

But far worse was to come.

The idle speed suddenly became very erratic.

Initially the idle was very slow and the car often cut out when I stopped at junctions, but fortunately restarted without any problem.

So I thought I'd whip a plug out to check, unfortunately as I pulled the Magnicor plug lead off by it's

"handle", it promptly fell apart.

Plugs were fine though

.

New TRD leads obtained and fitted, I checked and adjusted the setting of the screw on the afm to match the figure stamped on the body.

I then to check the TPS and noticed the throttle cable was so tight it wasn't actually resting on the end stop.

Having adjusted this to gain some slack, I checked the resistances of the TPS were within spec, and there were no major drop outs on the sweep, and then pulled out the feeler gauges and set it up according to the manual.

Finally, having bridged out the terminals in the diagnostic port I adjusted the screw on the throttle body

(it's a rev 2) and managed to get a fairly steady 800rpm idle speed when warm.

Sadly my apparent success was short lived.

A week or so later, for no apparent reason, the idle speed shot up to around 1800 when cold, and wouldn't drop below 1200 when warm.

Which seemed to indicate that the ICV was probably in need of a clean.

As I didn't want the car to be off the road for more than was absolutely necessary, I obtained a s/h rev 2 throttle body so that I could take my time cleaning this up prior to swapping them over.

Unfortunately before I could do that, one day shortly after leaving home, the engine management warning light came on for a few minutes then slowly started to fade out.

I immediately returned home and took the na instead.

Later when I got back home I tried to check for stored error codes, but found that the engine management warning light just kept flickering and fading in and out.

Markstevieandmads' suggestion that this was probably due to leaking capacitors in the ECU advice, proved to be correct.

Sure enough two capacitors had leaked badly, and damaged a number of adjacent pcb tracks.

I managed to find a replacement rev 2 ECU through the forums, which was lucky as Rev 2 ECUs seem to be fairly rare.

Unfortunately when I opened it up to check for leaking capacitors I found one the two capacitors that seem prone to this had in fact started to leak, but the good news was that I'd caught the problem early and there was no sign of any damage to the adjacent pcb tracks.

Whilst there was no reason to believe there was any immediate problem with the replacement ECU, I decided to change capacitors C810,



and C512 as a preventative measure, rather than wait until they became an issue.



Following a quick coat of PCB lacquer for a bit of protection, the replacement ECU was fitted and the engine management warning light issue sorted.

Unfortunately the same could not be said for the high idle speed.

Having obtained a replacement rev 2 throttle body, I stripped it and gave everything a thorough clean, including the ICV.

The operation of the ICV was checked with a 12v supply, and I also checked that the resistances were within spec, and that a 12v supply was present on the middle pin of the plug on the car.



The TPS was also checked and adjusted, so much easier than when it's on the car.



New gaskets were obtained from MR T and the throttle bodies swapped over.

Having removed the old throttle body, you could see that it was clearly pretty mucky.

.

.



But sadly swapping this for a nice clean one didn't solve the high idle speed.

That said, the idle speed was much more steady than it was previously, but at around 1,100 revs with a warm engine it was a long way off the book value of 800 rpm.

Prior to the car being taken off the road, I'd started renewing all the vac pipes, so I've now order some more tubing from SRS and will finish

that job off shortly so that I will at least know it's not a perished vac pipe somewhere that's causing the problem.

But other than that I'm rapidly running out of ideas about what it could be.

I've also had to spend time trying to sort out a running problem with my NA so that I could put it up for sale, and get a bit of cash back in the kitty.

This was finally traced back to a faulty ECU, and with the NA ECU replaced, it's now found a new home with a forum member in the Oxford area.

So some good news, but was a bit galling that that my old NA had a rock steady 800rpm idle when I sold it.

Paul