Car vibrates heavily on cold mornings

brendansmith

I have noticed this today and yesterday. When I start the car and for the first say 10 minutes the car is vibrating vigerously until the engine heats up. Revs are the same as normal on meter but seem to be rougher lately.

Any idea on what happening?

KamiKazi

It's shivering.

Duh :rolleyes:

Petrol or diesel. I presume it's petrol, may well be ignition issues, coils or cap perhaps. Your post is lacking a bit on detail, make, model etc Wouldn't rule out a worn engine mount resonating with the slightly higher revs at start up either. As said though you need to give more detail.

corktina

id say its because the auto choke is open and running a bit rougher as a result.

biko

I'd agree on the auto choke but it's been warm even in the mornings and the issues seems pretty new?

OP, Make etc as asked above.
Petrol/diesel?
Recent repairs?
Smoking?

Try to sit in car and give it a bit of gas, does it sound better in higher revs?
Maybe just idle that needs adjusting, throttlebody needs a clean or similar.

brendansmith

Im in New Zealand and its pretty cold here.

Its an old 91 toyota corona manual petrol

2 new front tyres & radio fitted and heater fan set to high (only has one speed, was on medium) although im pretty sure this has nothing to do with it.

Its smoking but its the usual grey steam smoke you get on cold mornings

Basically after 8 hours at night in a cold basment garage its rough and vibratey but after 9+ hours out in the open cold at work it runs like silk.

also when its vibrating heavily and i accelarate its not as responsive as it usually is

Any further thoughts?

Matt Simis

I would bet on it being an intake manifold vacuum/air leak. When the engine heats up it expands fittings slightly allowing better sealing when warm. Any additional smoke or steam would point to this too. If you try to drive it straight off the bat, does it seem like it wants to cut out?

I took mine off and resealed both banks with Intake sealant (the gaskets are nearly EUR300 each)

I Was VB

Could be a Injector??

CarMuppet

brendansmith wrote: »

Im in New Zealand and its pretty cold here.

Its an old 91 toyota corona manual petrol

2 new front tyres & radio fitted and heater fan set to high (only has one speed, was on medium) although im pretty sure this has nothing to do with it.

Its smoking but its the usual grey steam smoke you get on cold mornings

Basically after 8 hours at night in a cold basment garage its rough and vibratey but after 9+ hours out in the open cold at work it runs like silk.

also when its vibrating heavily and i accelarate its not as responsive as it usually is

Any further thoughts?

Could be a faulty mechanical thermostat not closing off when the engine coolant is cold..When you say cold are you talking under -10C ??

Or as said above, choke/intake problem..

Difficult to diagnose with seeing/hearing (or smelling) the car..

Best of luck,
CarMuppet

brendansmith

CarMuppet wrote: »

Could be a faulty mechanical thermostat not closing off when the engine coolant is cold..When you say cold are you talking under -10C ??

Or as said above, choke/intake problem..

Oh god no, not that cold at all maybe 1C maybe

Its strange because it wasnt as cold this morning and I drove to the end of the street.....car vibrating then i got out on to road behind a car, travelled maybe 3 meters and it was fine.