Long Running Problem- Low Tick-Over.

[Tommo_SaxVTR]

Hi all.

I have a mapped & throttle bodied saxo. When i start it over morning or from cold the tickover is on 500 but drives ok. After a couple of minutes of driving it ticks over perfectly fine. Although requires a little bit of gas to start it.
Before i got it mapped and bodied it was ok. Also i noticed when its ticking over ok, and i use things such as my lights, and heated rear windscreen, the revs drop again, not quite to 500 tho.
Its been doing this for a year now and would love to see it fixed (if possible).

Any Suggestions?

Thanks.

[Stevo123]

I am no expert but maybe there is a problem with the map you are using and it might need adjustment. Alternatively if a sensor is giving false signals to the ecu then you might expect running problems also.

I am not much help but i would start with checking sensors/connections/earths using a multimeterfirst

[Meto]

The revs dropping while using stuff like lights/heated screen is just because you are drawing more power so making the alternator work harder I think. Thats nothing to worry about although I dont' know about the other problem.

[AlexB]

sounds like it doesnt have a cold start map on there
its pretty common on bodies i know of a few that need a few minutes to warm up before there driveable

[raunchz]

how is it at idling when it's upto running temperature?

What Ecu you running?

[Tommo_SaxVTR]

how is it at idling when it's upto running temperature?

What Ecu you running?

It runs fine mate when up to temperature. Use to cut out tho when it got too hot, but i got that fixed- which was a mapping problem.

Im running a dta s40 ecu mate.

[raunchz]

I presume it will have a warmup map?

Do you have wideband?

What I have done, which suits me better as I can drive my car from cold fine - I've opened up the idle screw a tad to allow more air in, so it idle's at around 1100rpm when upto temp. This allows me to get a nice idle when the car is cold, as I can get a good afr - whereas with an idle of around 900rpm when hot, I found it to chug along at around 600-700rpm when cold even though the afr was good.

Whether this is technically right or wrong doesn't bother me, as it works perfectly fine on my car, and doesn't mean I have to wait for 5mins for it to warm up to drive it for 5mins to the shops.

You will need to reset your TPS sensor, and then It'll chuck all your map out depending on how far you move it (would only need 1/4-1/2 a turn)

IMO your best option is to take it to someone and get them to sort out the warm-up map - they'll need the car for a good week to get it spot on.

[Tommo_SaxVTR]

yeh thought that i might have to take it to someone raunchz. But was just double checking if there was anything i could do to help.
I did open up the idle screw which helped, but my ecu resets it to what its set to on that i think.

Thanks.