Fuel Injection Car (hyundai coupe) really hard to start, runs fine once started

shippyt 19 years ago

've got a Hyundai Coupe which is a 2.0 fuel injection jobby. Problem is that recently it just will not start for ages, it takes me at least a minute to get it running but once its going its as sweet as ever.

I've changed the plugs which resolved the problem for a couple of days but now its doing it again.

I think it may be something to do with the second accelerator cable which goes into a box fo some description and I'm guessing is controlled by the engine management system.

any info would be greatly appreciated.

thanks

Tim

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mrcheerful 19 years ago

Has this problem come about or has it always been there?

if plug changing cured it then probably it is a spark fault. A new plug can fire on a lower voltage, once running you don't need such a strong spark and the warm plug fires on a lower voltage too.

first check should be spark voltage, if low then that should be checked and the problem located. if not low then I would try and find what makes it start, for instance has it got a vacuum leak which can be counteracted by a richer mixture.

the second accelerator cable is probably from a cruise control , if not then there are other possibles.

mrcheerful

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Tim.. 19 years ago

First have the coolant temp sensor checked. Sounds like its not actually telling the ECU the engine is cold, so its fuelling for a hot motor.

Tim..

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shippyt 19 years ago

It does have cruise con so that would explain the seconde cable, cant believe I didn't think of that.

the problem did happen all of a sudden

The temp sensor sounds like a plan as after trying to start for a minute or so it does start i.e. when the engine is warmer. Would also explain why it fires up straight away when the engine is hot.

i wish haynes would hurry up and release a manual for the car :(

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shippyt 19 years ago

t does have cruise con so that would explain the seconde cable, cant believe I didn't think of that.

the problem did happen all of a sudden

The temp sensor sounds like a plan as after trying to start for a minute or so it does start i.e. when the engine is warmer. Would also explain why it fires up straight away when the engine is hot.

i wish haynes would hurry up and release a manual for the car :(

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