kirkhilles

2000 Infiniti I30 w/ 208,000 miles.

This is our backup car and so I'm trying to just "keep her running". A few days ago, I put in Techron with the car having about 5 gallons of gas left which is likely the first time the injectors have ever been cleaned.

Today, after driving a total of 105 miles since that point (or possibly coincidentally right when I'd expect the Techron to start working with the new fuel if it is based on when it was added in the tank), when I was coasting to a stop I stalled. I put it in park, started it and it stalled again. I tried again and gave it some gas and it fired back up. I parked, started it up, parked, started it up again and drove and later when I got to another coasting situation (I had a number of red lights at stop lights where it was fine) and it stalled. Started up again, drove for a little while and stalled when coasting again.

No Check Engine light came on, although I'll check it for sure when I get home.

I admit that I haven't been the best about ongoing maintenance (other than the basics like oil changes and such) since its a backup car, so you can expect things are probably dirty.

So... First off, could it be related to the Techron or is that just a coincidence? If not, what are the highest probabilities of failure? MAF sensor?

Thanks!!

Turbonut

I would check the IACV with a mm.

maxiiiboy

This is exactly what my car was doing when the MAF went bad. ("This" = "stalling when coasting to a light"). So, clean or replace your MAF and you should be fine.

There is some/smaller chance it could be your IACV but it's much less likely. To be sure, check for any pending codes.

Mattx

iTrader: (2)

Total coincidence with adding techron. I would check your maf. That's a good start then go from there. Depending on how long it's been since a tune up that might be the next step if cleaning/replacing maf doesn't solve your issue

kirkhilles

Thanks guys. I did clean the MAF sensor and now it seems to be idling great! I didn't pay enough attention to the idle before the cleaning to really be able to confirm it, but it hasn't stalled once after a few long back and forth drives so I'm feeling good about it.

For those who are debating, it really is VERY easy to do. Disconnect battery and take out 2 screws with that hex bolt (make sure you have a set) and it pulls out. Spray it, let dry and you're done. Easy-peasy. Should've done it a lot earlier.

Thanks!

arthur glazier

I think you are suppose to add Techron to a full tank, not 5 gallons.

kirkhilles

To close this out, the Techron was just a coincidence. The core problem was a IASC failure leading to a ECU failure. I didn't get the P0505 till a month later (granted not much driving there)