Bad idle

jozi · 25-09-2013 8:51pm #1

For far to long my parents car has had a bad idle, it's very irregular and it's as if the engine nearly stall every few seconds or so. This evening I also noticed while drivign and not accelerating the car would kind of lunge/brake a bit more the odd time, like the engine was stalling I guess.

Dad say there's new plugs, filter oil etc in there, a friend thought maybe the crank position sensor could be gone? Any way of checking this or findig what may be at fault?

George Dalton · 25-09-2013 9:59pm

Make?
Model?
Year?
Engine?
Any warning lights on?
Has anything been done to try and sort out the issue?

jozi · 26-09-2013 10:30am

George Dalton wrote: »

Make?
Model?
Year?
Engine?
Any warning lights on?
Has anything been done to try and sort out the issue?

2001 Daihatsu Yrv, 3cyl 1L. Engine warning light is on, not sure if anything has been done to sort it.

canhefixit · 26-09-2013 12:57pm

jozi wrote: »

2001 Daihatsu Yrv, 3cyl 1L. Engine warning light is on, not sure if anything has been done to sort it.

With the engine light on there will be stored codes, get these read first and take it from there or you will just end up replacing part after part until you fix it.

jozi · 26-09-2013 1:00pm

Where do you read the codes from? It's not exactly a very modern car

cletus · 26-09-2013 3:01pm

jozi wrote: »

Where do you read the codes from? It's not exactly a very modern car

you need diagnostic equipment to plug into the obd port on your car. If you cant do this yourself, a local mechanic should be able to, or if you give your location, a boardsie might be able to help

jca · 30-09-2013 3:35am

Being a 01 Daihatsu it might not have an obd socket. It might have an led on the ecu to flash any stored codes. If its a single point injector maybe a good cleanup of the butterfly with carburettor cleaner using a toothbrush might help.

cletus · 30-09-2013 7:28am

jca wrote: »

Being a 01 Daihatsu it might not have an obd socket. It might have an led on the ecu to flash any stored codes. If its a single point injector maybe a good cleanup of the butterfly with carburettor cleaner using a toothbrush might help.

Sorry, thought obd conpliance was from 01, my 99 fiesta has

jimgoose · 01-10-2013 1:01pm

cletus wrote: »

Sorry, thought obd conpliance was from 01, my 99 fiesta has

That'd be because of the Yank influence. They've had compulsory OBD for petrol since 1996. My '99 Jag supports OBD-II over a pulsewidth modulation carrier. Very '80s Detroit. :cool:

jozi · 04-10-2013 3:25pm

Anyone know where the ECU might be hiding on one of these? I googled but had not much luck really.

George Dalton · 04-10-2013 9:10pm

What are you going to do with the ECU when you find it?

jozi · 04-10-2013 9:22pm

See if there's an LED on it and if its got a fault code.

George Dalton · 04-10-2013 9:25pm

According to Autodata code reading is via diagnosic equipment only.

88manta · 04-10-2013 9:41pm

Diagnostic scan is only way to go...

Highly highly highly unlikely theres a n LED on the ECU to tell you whats wrong.

Search for the OBD plug and then search for someone with decent equipment to get it plugged in

jca · 05-10-2013 2:50pm

I think you would be better off starting with the basics first. Check the ignition system thoroughly, then look for cracked or broken rubber/plastic pipes,especially any attached to the manifold. Check the air filter and make sure the correct spark plugs are fitted. 99% of faults are down to broken connections or poor maintenance.

Bad idle

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