engine running issues

[razor344]

recently got a 92 rocco scala

running a 1.8 FI engine

1st issue is it doesnt like to start from cold, ive checked the 5th injector and it sprays fine so ive put it back in and resealed it, not sure what else to check, ive changed one of the leads and also the plugs

2nd issue is when in traffic the water temp goes up to just over 3/4 and the oil temp goes from 90 to 120 all this happens very quickly and the car then runs a bit crap when its really hot

3rd issue, when its warm and you dip the clutch to come to a stop the revs drop right off and some times cuts out


on a run the car is great


i dont know water cooled engines so please be gentle with me

thanks marc

[marcus]

Other people on here will probably have more useful things to say, but here's my tuppence-worth:

Cold starting: why did you change one plug lead? In my experience, ignition problems are the most common cause of starting issues, maybe there's something else wrong there. Also, electronics are quite sensitive to temperature, so maybe your cutting-out issues are ignition-related?

Temperature going to 3/4 in traffic: not out of the ordinary, but maybe flush out the rad, and change the coolant. Maybe your waterpump is on the way out, or maybe your fan isn't kicking in when it should, perhaps the temperature switch is faulty.

[mark1gls]

Always worth replacing dissy cap and rotor arm along with HT leads if you don't know how old they are.

[razor344]

right then

running a little better

have changed the WUR and starts a little nicer

have fitted a new rad temp senser and the fan now kicks in at an oil temp of 90 degres and stays on longer than before

when its warm it still dropps the revs right down when you take your foot off and some times cuts out

is there a throttle control valve or some thing


going to get some new leads and dizzy cap and rotor arm etc next month

thanks marc

[markh]

Have you checked all the vacuum pipes ? Nothing loose, split or perished ?

[ChrisPears]

There's an idle control valve, lives on the back of the inlet manifold if I remember right. circular thing with a pipe coming out of each end. They get gunked up and stop opening/closing. Check its getting voltage, and give it a good blast of carb cleaner, or even better soak it in petrol overnight.

[MikeH]

Should have an Aux Air Valve on the back of the inlet manifold. check the pipes aren't split and the wiring isn't broken. Should also be an Idle Boost Valve on the driver's suspension turret. There are tests for them in the Haynes manual, if you have one.