Unexpected problem!

This section is dedicated to discussion of DTA engine control units such as the DTA E48 EXP, P8 Pro, DTA S40, S60, S80, and S100, as well as all things ECU related.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: Unexpected problem!

Post by stevieturbo »

gnutz2 wrote:
stevieturbo wrote:I think that's what it shows anyway ?

Most cars will work perfectly fine with no case ground, I think mine was the first ( or certainly one of the first ) to exhibit problems with the S-Series first came out !
So you had problems when grounding the case? What kind of problems?
No, I had problems when there was no way to ground the case.

The problems in my case were small, but very annoying. For most part car drove fine, and no apparent issues under load.

However when pulling away from a stop, it had a really easy tendency to stall. And when cruising at say 70mph every now and then the engine would basically hiccup. No rhyme nor reason as to the circumstances or times it would happen, just seemed random, but most noticeable at those times.
And it would put you in mind that the damn thing was about to breakdown.

So I would say it had somehow affected the crank trigger or something, but that was nearly 10 years ago, so dont recall all the details, other than those symptoms.

As I had changed from a P8Pro..I had made a patch harness so it was very easy for me to swap back. With it re-fitted there was no problem.

Allan eventually came to the conclusion of earthing the case ( via the comms connector plug nut ) and amazingly that fixed it.
He had deliberately made the case totally isolated from all wiring...I think he mentioned in case some dummies managed to short the case out in the car. I guess someone must have done it at some time with other ecus lol.
gnutz2
Posts: 190
Joined: Tue Jul 03, 2012 2:33 am
ECU Model: S100 Pro

Re: Unexpected problem!

Post by gnutz2 »

Image

This is what happens when I ground the case, normal operating would see one cam error when starting the car and that's it.

The solution for now is leaving the ground off.
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