Technical Rough idle punto HGT

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Technical Rough idle punto HGT

PedroHGT

New member
Joined
May 8, 2022
Messages
7
Location
Portugal
I have recently bought an hgt and it idles rough, the symptoms are:
it goes from 1000rpm to near stall then back up again. (it has stalled on ne a couple times when clutch is pressed)
When driving when i presse the clutch to change gears it holds revs for about 1-2sec then drop like normal.
i dont know if any of you had this problem?
 

jimmywiggles

New member
Joined
Apr 5, 2019
Messages
1
This problem is exactly why i joined this forum, to get help and theres loads of it here.
I've just bought a fiat and I need help to on the same situation with a 1.2L 500c. Rough idling and stalling. somehow, I think I might have solved my problem, but not 100% sure yet.

Loads of things could be wrong, faulty coil pack, vaccum leaks, spark plugs even low oil pressure, the list goes on and on. So for me, an OBDII reader shows no fault, even after its stalled. so I force it to fault (not sure how safe this is, so DO NOT copy me. this is the risk I am taking and could damage the engine even more), I turn off the engine and unplug the Cam shaft position sensor and restart the engine and it seems to run smoother and doesn't stall, but the engine management light will come on and show a P0010 Fault on the OBDII reader. I turn off the engine and replace the electrical plug and we're back to rough idling and stalling. So I've ordered a new cam shaft position sensor and we will see what happens after i fit that, At £26 + postage it's not a lot and worth the try and I'll update you if it solves my problem.

If anyone else has an idea to try, I'm more than eager to hear.

After that, I have a contact in my local college who teaches Auto Mechanics, they'll have a look, but not sure how i feel if i have to let student repair it. But hey-ho everyone has to start somewhere.
 
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PedroHGT

PedroHGT

New member
Joined
May 8, 2022
Messages
7
Location
Portugal
Well it all went bananas a couple days ago now the car misfires like crazy and doesnt want to run i didnt do anything to it tho
 

Mike1alike

Active member
Joined
Aug 3, 2017
Messages
428
Location
Timisoara
For the rough idle there could be indeed many possible causes and here is a topic about it:
And take what you can from that topic, but I suggest to consider my post #36 there, if that could be the cause of your engine's problem.
After I replaced those gaskets, the engine runs very well, it still runs well. And before replacing them, idle was rough, very rough.
And also, post #42 there could be the fix, meaning that the problem could be caused by IACV (Idle Air Control Valve) malfunction.
 
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