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Unplugged Battery, Car Now Stalls On Startup

xscape237
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xscape237 Rising Star

xscape237

Posted
Posted

Folks.

I unplugged my battery while working on the car, and now it does not start properly when the motor is warm. I have to blip the throttle otherwise it stalls.

Otherwise the car is fine, running better than ever.

I tried the ECU rest, idle resets, etc, but its hard to tell if i was successful.

Any ideas on solutions? Or is it just a matter of time while the ECU relearns?

Cheers

Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

You need a new PCV valve methinks..

As an interim solution, remove the PCV valve, thoroughly clean with carby cleaner, reinstall, start and warm up car, then off-start (it may still stall), off, start, off start a few times. Soon after it won't stall anymore.

I did the above process and while straight after cleaning, it stalled after i started it about 3-4 times.. the next time i drove the car a few days later it didn't happen again. Getting a new PCV valve myself..ebay USA have 'em.

GL.

Blue Arrow Enthusiast

Blue Arrow

Posted
Posted
Folks.

I unplugged my battery while working on the car, and now it does not start properly when the motor is warm. I have to blip the throttle otherwise it stalls.

Otherwise the car is fine, running better than ever.

I tried the ECU rest, idle resets, etc, but its hard to tell if i was successful.

Any ideas on solutions? Or is it just a matter of time while the ECU relearns?

Cheers

i had the same problem a while back when the battery died. it took a while but it looks like the ecu was able to make the adjustment. i was thinking of bringing it in for service because it was annoying (being a manual) but it eventually fixed itself. but like i said, it took a few weeks. have not had the problem since.

Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

After your cars fixed itself..do your revs drop below normal idle setting (550rpm) when you clutch in to goto neautral, or also when you goto neautral and brake hard/semi hard ?

Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

Interesting!

Good to know thankyou :blink:.

Almost certain a couple of NM35 stagea owners also had problems with hot start stalling, but like me they also suffered from revs dropping below idle on clutch in sometimes, especially under semi hard to hard braking. I've got the thread bookmarked but too lazy to open lol. Anyways, when one of them replaced their PCV valve, problem solved. I cleaned mine and the car is definitely running smoother.

I must say sounds like Xscape is having issues with the battery d/c then, not the valve.

xscape237 Rising Star

xscape237

Posted
  • Author
Posted

Thanks guys. I will see how it goes over the next couple of weeks then.

Rianto, Saturday is doubtful for me at this stage as I have a date with a dyno. If anything I will make it to the car wash very briefly - it is filthy as hell afterall.

Anyway. The problem occurred after 30 minutes of having the battery disconnected. I was waiting for the motor to cool down before attempting to install my plenum spacer, but got impatient and decided it would be best to tackle it the next day. Hooked up the battery again and it wouldnt start properly.

On that note, I've since installed the spacer (motordyne iso thermal kit) and my review is that yes there appears to be a very slight increase in power. I got the kit with the additional gasket (b/w lower plenum and heads) and the coolant bypass valve - both of which seem to be working as the plenum is much cooler to touch after going for a spirited drive. Worth the money? provided you dont pay for installation - definitely.

Cracked open the plenum, wasnt too surprised to see 70,000 kms worth of caked on oil and carbon.

spacer.jpg

Carby cleaner FTW

spacer3.jpg

xscape237 Rising Star

xscape237

Posted
  • Author
Posted

Thats correct.

It was unplugged for about 30 minutes, maybe a bit longer.. Was getting too late in the afternoon and the motor was still hot so i plugged it back in to move the car.. and it kept stalling on start up unless i blipped the throttle.

I did the plenum install the next morning.

The car starts normallly when cold and drives perfectly fine all the time. Its just hot starts that are giving me trouble.

  • 3 months later...
superspit Mentor

superspit

Posted
Posted
its not abnormal

it happens to alot of peoples cars

and yes it only happens on hot starts. cold starts are fine.

dont worry about it, will go away.

EXACT SAME issue here....discon batt (as not using car for a while and GPS sucks power, flattens battery when parked).

PROBLEM IS that that was 3 weeks ago...after some driving, hot starts STILL require acc pedal depress to keep idling, then all's fine.

BUMMMMMMMER!

I need to find the PCV on this car!...anyone got a pic with an arrow pointing to it?...lol.

OR...bring up the idle (how to do how to do?) by 150 rpm and that seems to solve it (simulated by slight pedal depress mimicking 150 rpm increase seems to work).

Cheers.

  • 2 months later...
superspit Mentor

superspit

Posted
Posted
- Nope didn't fix it, going to try PCV and inspect throttle body next...

Got mine fixed a few weeks back, during a major service.....(46000 km)

Throttle body had to be removed and cleaned, (it was filthy) some sort of callibration of the throttle had to take place....now all ok. (idles nice and won't stall on warm start!)

I try really hard now not to let the battery go flat!!...(could be just coincidental, but I ain't taking any risks).

Oh, as for PCV valve?,,,,,I couldn't find mine!!!....(nor could the mechanic!)...anyways, car is great now.

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