1.3 deisel 56 plate I have problems after starting cold feels like it's missing and hunting if you go to pull of it will stall have to give it loads of revs to pull away as soon as I've done that it's ok !
Changed map sensor , temp sensor new fuel filter cleaned egr don't no what to do now please can anyone help me !!!!

Could this be the MAF sensor anyone help me !!!

ONCE AGAIN,

we need a minimum of info: what's the engine ??

Bernie

1.3 punto grande multijet

There are TWO Grande 1.3 mjt, one is 75bhp, the other 90bhp (there is even one 85bhp in Belgium which was a special serie...).
They both use turbo's but with absolutely different control !

It is not to annoy people that we (I) ask for more info !

Unless you want answers like "this has already been discussed on the forum, do a search, bla bla bla" be more precise in your request and provide us with some material to chew ;-)

Regards, Bernie

What's the BHP of your car ???

Sorry it's a 90 bhp

Sorry new to all of this went to the garage today they said it could be diesel pushing back ?

Hi Paul,

diesel pushing back !? Whatever they meant with that I would translate by " don't know" Did they fix something or was it just a diagnostic ??

You say you're new to this, that's fine, you'll get soon used to the basic "rules" on the forum... So let's expand a bit:

- 1.3 mjt 90 has a turbo with moving vanes, while the 75bhp has wastegated turbo.
- the moving vanes are there to "regulate" the turbo pressure (boost).
- thery are actuated by vacuum.
- the vacuum is generated by a pump and shared with the braking servo.
- this vacuum is stored in an accumulator, for the vanes only.
- an electro-valve controls the vacuum actuator that moves the vanes.
- this electro-valve is driven by the ECU as follow.

At low engine speed and low load, the vanes are oriented so get the turbo spinning with little exhaust gas. This allows the turbo to react "quickly" to any gas increase (take off).
At high speed / load the vanes are oriented so the exhaust gas flow goes almost straight and without reaction on the turbine blades, thus limiting the boost pressure.
They're also used to create an artificial "engine brake" during deceleration by "blocking" the exhaust.

When allowed by the electro-valve, the vacuum stored in the accumulator pulls the actuator membrane that itself moves the vanes lever accordingly to ECU's request.
One component of that chain being bad, you'd have power loss issue. Engine light would also probably pop-up on the dashboard.

Before going further in finding the problem, we need to know how confident you'd be with rolling-up your sleeves and spending some ££ in MES/FES/ELM ??
This MES/FES piece of software will allow you to check almost the entire electronics on your GP and almost all other Fiat models aswell as Alfa's and Lancia's for less than 100£ and really is a MUST for any Fiat enthusiast...

Regards, Bernie

If someone here helped You fix or understand your issue, hit the thanks icon @ bottom right, it's free and make us happy ...

I think is over my head I need someone to tell me what it is who would have this software that could do this for me thanks for your help

Paulc5060 said:

I think is over my head I need someone to tell me what it is who would have this software that could do this for me thanks for your help

Click to expand...

Agree on MES. However given this is a cold start problem on a diesel have you checked glow plugs? Try starting the car differently
- turn the ignition on, leave a few seconds
- repeat
- start


Might tell you if you have a weak/dying glowplug - though you'll have to test them to see which one

@ DGPunto: this is NOT a cold start issue, Paul says it starts but have hard to take-off, like missing power (which turbo stuff would explain). That can't be glowplugs related, once started a diesel engine is started, there is no extra deposit of petrol vapour on the cold cylinder wall/air conduits, might be a bit shaky and noisy but not missing power, unless problem with high pressure regulator or pump, not forgeting the primary pump, filter, etc. or with the ECU, or with the turbo... Lot of stuff that can be checket quite easily with MES and maybe a mentor over the shoulder...

@ Paul: do spent a few £ and buy an ELM and the MES license, you won't regret it. The sooner you buy it the more it will help save money by avoiding replacing parts "as to see if it works" ...

Regards, Bernie

It's not glow plugs as fitted new ones ,and I don't think it's a turbo it's just on tick over when cold hunting missing as soon as you pull away it goes ok it's like air in the fuel !!!!

Hi Paul,

will take some pics later this morning so you'll know what to look at in the engine bay. You'll need an assistant to push the pedal while you check the turbo actuator...

Regards, Bernie

Hi Bernie
Just come from the garage and they have said there is a Miss fire all the time but have not a had time to put it on a scanner could this be a injector problem?
Thanks
Paul need help

Hi Paul,

a bad injector could cause such erratic behavior, but a bad connection to it too !! At that point and as I understand you're not really willing to "get dirty" (no offense here ;-), I'd suggest to leave Her in pro's hands. Just be carefull about any unecessary part replacement, some (bad) mechanics are prone to replace this and that until the car runs ok, after all the customer pays the bill anyway so they (some of them) don't really care about being too much Pro's ...

@ forumers : anyone could recommend someone in Paul's area, I'm sure they're plenty of them ...

Regards, Bernie

Hi Bernie
I don't mind get my hands dirty just done the egr valve clean and that was ok anything you can help me with would be great if you could give me some pointers!

Regards
Paul
Forest of Dean. Coleford

Also what I don't understand is when the cat is at running temp it feels ok doesn't sound like it's missing but as they said at the garage it would sound better when warm also they are going to check the compression .
Regards
Paul
Any help will be great!!?

Sorry should say car not cat !!!

Hi Paul,

hahaaa, good to hear you get dirty nails ;-) ! Congrats about the EGR stuff, it's not exactly the easyest task on a 1.3 mjt.

About your issue: as you and the garage said it seems to be engine temperature related so let's concentrate on this. But before anything we need to collect data from your car. Are you considering throwing some ££ for an OBD2 / ELM interface ? If so have a look here: http://www.multiecuscan.net

Regards, Bernie

ps: You see how it's important to be precise ? CAT for me would have been the catalyst, while CAR is, well, the GP herself ;-)

Hi Bernie
Just come from the garage they have tested engine compression that's ok tested the wired plugs to the each injector that was ok they think that number 4 injector is not working so don't no what to do now ?