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General MY MK1 75 Running Problems

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General MY MK1 75 Running Problems

RED_75SX

RED_75SX

New member
Joined
Aug 17, 2005
Messages
116
Points
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Location
Diego Martin,West Trinida
Hey Guys
I have given up now
My 1999 Fiat Punto 75sx is really giving alot of trouble

First off
When it is cold and the car is first started from sitting for a long time its starts perfect and idles lovely

BUT..........
Once its started for the day and has gotten up to temp...IF you turn off and try to restart it hesitates a bit.It hard Starts

Now when i am driving i am getting a serious mis fire and it really make the car a pain to drive...it has gotten very slow sometimes if i mash the throttle a lil(1-2%) it wants to shut off

HELP!!
thanks
 
RED_75SX said:
Hey Guys
I have given up now
My 1999 Fiat Punto 75sx is really giving alot of trouble

First off
When it is cold and the car is first started from sitting for a long time its starts perfect and idles lovely

BUT..........
Once its started for the day and has gotten up to temp...IF you turn off and try to restart it hesitates a bit.It hard Starts

Now when i am driving i am getting a serious mis fire and it really make the car a pain to drive...it has gotten very slow sometimes if i mash the throttle a lil(1-2%) it wants to shut off

HELP!!
thanks
Click to expand...

You could have an engine coil problem, what does the engine sound like?
 
HT leads.
spark plugs
crank position sensor (can get filthy as the arch liner doesn't protect it that well), remove it, clean with wd40, replace. The wiring that goes to the sensor can also get very brittle and crack. Mine was failing to start on cold mornings, and it turned out it the wire was just about to totally crack thru. took me 20mins to make a new wire and haven't had any probs since.
 
Try resetting the ECU this should fix the problem but if you find after a while it gradually comes back then its likely a faulty sensor confusing the ECU..
Sounds like the lambda sensor or as you said temp sensor but try resetting the ECU and see if that makes any difference...
 
Changed HT Leads and plugs
Lambda Changed
Crank Position changed
Coil Packs changed
Head Gasket Changed
Tried another throttle body
Even Fuel Pump

So now i need to change the coolant Temp Sensor
Its the red 3 Pin one that mounts on the Intake Manifold
Anyone know where i can get one.....i cant get any here in trinidad and my luck in the uk same

HELP
 
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