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-   -   Car won't idle (https://www.rx8club.com/series-i-trouble-shooting-95/car-wont-idle-208420/)

RX-865 11-29-2010 07:50 PM

Please explain Charles

RX-865 11-30-2010 10:26 AM

Well I'm going to pull out the plugs later and inspect them and see if they need to be cleaned. Maybe I'll get it running

RX-865 12-02-2010 04:32 PM

Fuel pump is dead. Kevin Landers came by and helped me check it out, and figured out there was barely any fuel being pumped into my motor. Which would explain the extreme lean reading on my AP

DeViLbOi 12-02-2010 04:49 PM

RX-865 - Your AFR wasn't lean from what you posted and how was the fuel pump tested?

And for your benefit...

tza - To correct your statement about drive cycles the car must go from cold to hot and back to cold again to be counted as one drive cycle. Going from cold to hot and hot to hot would still be counted as a single drive cycle. Also, your plugs will be wet before your car starts showing the flooded condition...once you get the car started your plugs will be dry as the fuel was burned off.

RX-865 12-02-2010 05:29 PM

I thought the higher the number the leaner the mixture? I may have gotten confused in the earlier posts and put rich by mistake. I clamped two fuel lines I believe (kevin actually unhooked them) with a red clamp and blue clamp. I then cranked the car while he watched the very little amounts of fuel shoot out. Then I watched while he cranked and the fuel was in very short bursts that didn't seem to have much pressure behind them. They would barely shoot up 6 inches and he said it should shoot fuel onto my windshield. Charles said earlier, given by the symptoms, that it was my fuel pump that went bad.

DeViLbOi 12-02-2010 05:35 PM

The greater the AFR number the leaner you are running...but the numbers you posted were within normal ranges.

RX-865 12-02-2010 05:42 PM


Originally Posted by DeViLbOi (Post 3804409)
The greater the AFR number the leaner you are running...but the numbers you posted were within normal ranges.

When it was losing power and died it was cycling between low 17's and 20.3. That's not normal ranges. 15.3 or a low 15 is the leanest my car gets while cruising so I knew something wasn't right. But I believe earlier I said it was running rich. I got confused. Sorry for the confusion.

DeViLbOi 12-02-2010 05:58 PM

Again...14.7 is your target AFR so 15 is not lean. Here...try reading these two posts...

https://www.rx8club.com/showpost.php...91&postcount=9
https://www.rx8club.com/showpost.php...5&postcount=13

RX-865 12-02-2010 06:25 PM

Yeah I know that 14.7 is the target and I know 15 is not lean. I was just saying I thought it was kinda odd that AP was reading than the average my car normally runs. I know since using the AP I have an overall idea of what my car is running diagnositc wise when it is perfectly fine. Just the fact that it was slightly off at first just kinda had me wondering what was up, but I shrugged it off because like you said 15 is not lean, but when it was going from 17 to 20.3 I got worried.

RX-865 12-03-2010 08:35 AM

Thank you Charles. Much appreciated it

RX-865 12-03-2010 09:18 AM


Originally Posted by Charles R. Hill (Post 3805008)
That is why you trusted me with your money in the first place. ;)
The Walbro pump motors, although a pretty decent pump, have failure rates a little higher than the 1% I am willing to accept (which is an OEM-accepted rate) and MazdaManiac has discussed this for me with the Walbro guys while he was at SEMA. By comparison, the ignition coils we use in our kits have a FAR lower failure rate; we have lost 6 coils out of the total 2,000 we have shipped (.003%).

In any event, I keep spare pump motors around all the time as these things sell pretty quick.

Sounds like you're trying to sell me an Ignition system there Charles ;) haha


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