Hello i got a problem with a Fiat bravo 1.6. This car won't run good, the map reading is 500 mbar and i can't find any leaks in the intake system with a smoke machine. Also the primary signal i captured is strange, can somebody tell me what is causing this. Ontsteking Fiat.JPG Also attached the psd...

Hi John welcome! You should get plenty of help on here, hope I can be of some help, I'm no expert on the pico scope, but had a lot of experience in the motor trade using other types of equipment, including scopes. Again welcome Kev

Hi Liteace, If you look at the waveform where he opens the throttle, you can see throttle and MAP rise quickly closely followed by lambda, at that point the throttle is released, this section becomes 'overrun' and fuel is usually 'shut off' at this point resulting in excess air which the Lambda resp...

Hi Gruss, Your welcome, and 'thank you' for posting originally. The waveform was slightly erratic on the bad pump which was almost certainly a result of pressure differences as the pump dumped the fuel then tried to build back up again. But I think what was more important than that was the average c...

It's not a problem Liteace, that's what it's all about! Nobody is infallible!

Kev

Hi Gruss, Thanks for uploading the ps data files, it's a great way to share info and to help in resolving problems. First of all I would like to point out that the new pump was demanding greater current draw which is what I expected to see. If you go back to your original pressure tests you stated t...

Hi Mark,
Welcome, sorry only just got back off hols so first chance to welcome you! Hope your ready to tie yourself in knots!

Hi Scanner Danner, I can see where you are coming from with this Chevy, there's no obvious sign that I can see with compression. I would be very tempted to remove the injector from #1 cylinder and swap it with say #6 or one that's easy to get at! I would be interested to see if the misfire count on ...

Cheers Scanner Danner,
I watched some of your stuff on youtube last night, found it interesting. Look forward to having a chat with you very soon, shattered at moment just got back from helping friend with gearbox on Toyota!!

Oh by the way,
If the valve clearances are within spec, I'll go for a stuck piston ring! . . . Is that cheating!!