Technical HELP! Punto 60 won't rev past 4k!

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Technical HELP! Punto 60 won't rev past 4k!

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Mar 27, 2008
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As title, my punto 60 won't rev over 4- 4.5k

It was misfiring so I changed the HT leads which has made it smooth but still wont go over 4-4.5k

Any ideas?

Ta:worship:
 
Thanks for the reply. No warning lights on dash!

the manifold is blowing at the join to the downpipe... would that make a difference? Would a blocked CAT cause the engine to not rev up tho?:confused:

I could try a cheapo coil from work (ECP)

Ta again
 
if the CAT starts disintegrating inside then yes it can block up the exhaust and that limits the flow and thus power. same goes for the internals on silencers, not particularly common problem but has happen to me twice in the last decade. It blowing will not help but shouldn't make it not rev past a certain speed.
 
Ok ta for info.

Someone has suggested a dirty/damaged throttle body could be a problem or a faulty crank sensor.

I know how to clean the carb bit, but where is the crank sensor on these?

ta, Ian
 
Can you rev the engine higher the 4.5K when the car is not moving, i.e. not in gear?
 
I would say if you can not rev to the limiter without load is quite likely the ECU is running in limp mode. But usually this is accompanied by the warning light staying on. Make sure the warning light bulb is working first. You should see the warning light on when you turn the ignition on. If you don't the bulb is dead or disconnected and you don't know what is happening. I will be surprised a blocked cat will stop reving to redline without load but is still possible I suppose. Is your car defenetelly a MK1 Punto?
 
the cat failing can do that, somewhere or other i have the bit from inside my dads old cat, it had broken down into what can only be described as an egg shape and at certain revs it was pushed back into the exit of the CAT blocking it, engine could slowly push past this point if you kept your foot planted but didn't like it.

I remember almost exactly the same thing happened to one of the cinq turbo's on here, was a while back when martin owned a yellow one but its not really been on the forum for a long time now.

Eklipze3k's sei is doing this exact thing atm, gets stuck at 3k and i'm pretty sure its a blocked silencer on there (no CAT fitted).

I'm not sayiing its defo the problem but it could be and i have seen it more than once.
 
UPDATE

car cut out total loss off power. Won't restart had to push it to a garage where its sat outside at mo. Will give you an update as soon as i know anything.

Thanks for your input so far guys.
 
Right.

both coils changed, new leads, plugs, fuel filter and crank sensor

runs now but still wont rev up and is drinking fuel.

Mechanic reckons it's something to do with the cylinder head and his diagnosis was scrapyard!
 
so his diagnosis is it might be that, scrap it. He sounds like a great mechanic :rolleyes:

Can you get a video of this uploaded? Considering how quick it would be, just drop the exhaust off and start it, see if it revs past 4k - clearly don't drive it or anything and it will be very loud so at a sociable hour ;)
 
Thanks for all the replies guys. I ended up part-ex'ing the motor against a 57 plate Panda from my local FIAT dealer.

Will post some pics up in the appropriate section when i pick it up Monday

cheers again!
 
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