Help please identifying a tune chip

Help please identifying a tune chip

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Dalamar

Original Poster:

251 posts

74 months

Monday 17th September 2018
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I recently made up a Rovergauge cable using the info at:

https://github.com/colinbourassa/libcomm14cux/blob...

and got Rovergauge working on my 95 Chimaera 400 to diagnose and fix an overfueling problem. I managed to fix the problem which turned out to a loose plenum hose near the throttle body and a perished hose from the fuel regulator to the back of the plenum.

Screenshot enclosed of the car warmed up. Hopefully it looks ok those who use Rovergauge lots.



Anyway, one thing I thought was strange was that it had a tune file of R3116 listed at the top. I was expecting R2967 or R3652. I'd read that R3116 was more for a 4.2L Land Rover so perhaps I'd bought the car (last year) with a non-TVR 14CUX fitted. Wouldn't surprise me in the least... The car runs well so it wasn't a major issue.

Last weekend I decided to open the 14CUX and I knew the car had had water damage in the past as the floor pan was like swiss cheese when I bought it but out poured sand and bits of aluminium corrosion from the case! Brilliant. All was not lost as it cleaned up well and there was no obvious damage to the PCB or components. I must have caught the issue in time.

What I did notice was that the PROM looked like a specialist tune chip as it had one of those decoder boards attached. I've never seen these before and it has the red blobs of paint in one corner to identify pin 1 as RPI supply. There wasn't a sticker attached or any remnants of one in the case. By the way the fault code cleared once I cleaned up the tune resistor connections.

Could it be an Optimax or a Tornado chip or a specialist chip? Can anyone tell from the pictures please?





Belle427

8,864 posts

232 months

Thursday 20th September 2018
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May be better to move this to the Chimaera section as it gets a bit more traffic.

Dalamar

Original Poster:

251 posts

74 months

Thursday 20th September 2018
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Thanks, I've moved it now. Contacted RPI in the meantime and they think it might be from the chap who originally decoded the 14CUX software.

Jobster

100 posts

97 months

Thursday 20th September 2018
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It's an 27C256 VU erasable chip. Brand or supplier I don't know.