Engine running very strange need help!

[esp88]

Hi folks

Her is the today stauts :

THe driving with O2 sensor on highway (100-140 Km) no problem but down to 60- 80KM

(or 2000- 3000 RPM), its just misfireing or what shall I call (bad responding)

So, way back disconnect O2 sensor then I can drive thought the town 40-80 Km speed

No problem.

After 30 km drive and back to home then connect the FreeScan but funny thing is now showing

O2 votage not bad was before (Not up/down as before ). The MAP sensor showing between 0.46 - 0.56 even swapped to the new MAP sensor not change (even swap the ECU but Not changed at all ) ?

It should some thing I missed her (I should check again cables some where maybe bad connection

or bad cables

And another probem I got is my old laptop hang many time; so I can't record the logs

(what a luck ..... Need coffee break ...)

Y.Hotta

Edited March 4, 2007 by esp88

[esp88]

No luck today

I will contact PUK or SJ to order O2 sensor tomorrow !

I hope it will solve my problem ......

(I have to work from 7AM tomorrow, so a beer/whisey and bed time )

Y.Hotta

[fjmuurling]

Hello,

Normally the O2 readings should be jumping up and down for a good working lambda sensor. I had a similar problem after fitting a new exhaust and cat complete with a new aftermarlet lambda sensor. The car ran poor, stuttered and stalled until the engine was warm but even then it didn't run very well, it still hesitated when I applyed the throttle. After struggling with the problem ( Freescan log showing a working O2 sensor) for several 100's of kms I fitted a new original O2 sensor and since then the engine is running perfectly. I also read in other posts on this forum that the only way to go is for an original O2 sensor.

Just my thoughts.

Freek

Edited March 4, 2007 by fjmuurling

[esp88]

Thanks guys

I really hope the O2 sensor is caused the problem !!!

I woulder how long O2 senser has life time ?

I'm thinking.... it's nice to have some spare like O2 sensor, MAP...

Does anybody any comments/suggeestion for a home mechenic (with limited tools )

I ran the injections(S4 enigne) on my Espirt turbo Carb. changed last year and this winter was the first time with Injection and I 'm woldering how avaiblity with these sensors.

(I'm driving my Esprit every day about 40 km )

Y.Hotta

Edited March 4, 2007 by esp88

[esp88]

Finally OS sensor arrived from PUK and replaced yesterday!

I haven't check with FreeScan yet, but driving to work today was much better than before !!

Y.Hotta

Edited March 9, 2007 by esp88

[t70]

Great to hear!!! I'm happy that between all of us we were able to come to a conclusion that was of assistance!

[esp88]

Thanks Folks

The problem I had rpm 2000-3000 almost gone (before it was

driving car with Choke)

I'm still 100% sure every things work OK but raining today and I have no time/chance to check with FreeScan !

And now I have to pack and ready to take a ferry to U.K tomorrow afternoon !

So, I'm lille bit stressed !!

Yasuo Hotta

Edited March 9, 2007 by esp88

[Malc Holmes]

Great News Yasuo,

We will together break a new Holmes family record when you arrive on Friday of having 4 Esprits on the drive at the same time. Shame I can't get my SE down as well to make it 5!

Good luck with the journey. I have my fingers crossed for you!

Malc

www.espritism.com

[esp88]

Thanks Malc

See you soon and all Esprit frends in U.K

(I'm really hoping My Esprit can make it )

Tomorrow I have to drive around 300Km to catch the ferry to U.K !

Yasuo Hotta

[Dan]

Yasuo - glad your problem is sorted, look forward to seeing you and your car at Donington

Dan.

[esp88]

Arrived U.K Sunday without problem !

I hopse see you guys on saturday at Donnington !

Yasuo Hotta

[esp88]

Well, I just recived a mail from Dermot for analysing my freescan log

(Now I got USB adaptor to connect the IBM laptop working fine ).

And I'm very happy with the result from Dermot !

Many thanks Dermot !!!

So, the conlusion is the O2 sensor fault caused the engine troble.

Have a nice Easter

Y.Hotta

Now I can start the brake upgrade project