Root of problems? 2 Different part #s!!
#1
Slowest Progress Ever
Thread Starter
iTrader: (26)
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 6,022
Total Cats: 304
Root of problems? 2 Different part #s!!
So you may have been reading about how my car goes crazy with AFR's and idles high, well I think I may have found the problem and this might help others. I thought the high idle was caused by a vacuum leak around the injectors because my vac/ boost gauge reads correctly, but the engine runs lean. As I previously mentioned, I had put new injector "isolators" in there. These are the little black washers that slip around the injector stem, and seal the injector to the intake manifold. The Miata part number is 13-257. I remember these not fitting perfectly snug on my injectors (RX-7 460's PN-195500-2010.) I called the Mazda dealer and they looked up the Miata part number, and then I told them I swapped my Miata injectors with RX-7's and are these isolators the same? They told me "No" and gave me this part number N350-13-257. I'm like 13-257? that's the same number. The guy said it's a reference that the computer uses to identify this as the "isolator" and that the RX-7 part is different than the Miata part. I didn't really believe him so I asked the price and he said $2.75 I think, the Miata ones were $3.90. So if the price is different, than the part must be different. I am picking these up on Friday, and I'm putting these in right away. I think this may very well be the root of all my AFR craziness, at least I am crossing my fingers...
#6
Slowest Progress Ever
Thread Starter
iTrader: (26)
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 6,022
Total Cats: 304
When I put the miata isolators on the RX-7 injectors, they felt sloppy like they weren't near as tight as when they were on the stock miata injectors. If this fixes the problem and my car runs great, and my AFR's run smooth, I'll take back everything bad I ever said about MS. My friend's dad is in business with Bowling and Grippo and he actually told me about MS before I even was a member of this web site. He said that your engine has to be pretty much in perfect running order for the MS to work, just like any other ECU. He told me if the engine isn't up to par, I'll never get it to run right off of the MS and this is why a lot of people claim MS and EMS-Pro to be garbage. When in retrospect, it's simply a machanical flaw, or the user themselves.
#9
Slowest Progress Ever
Thread Starter
iTrader: (26)
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 6,022
Total Cats: 304
swapped insulators again
So I picked up my RX-7 insulators today, threw em on, started the car up, and same thing. Actually it seemed to idle a little lower, like 1300 RPM. The miata insulators had like a taper on them, while the RX-7 ones were just like fat washers with no tapers. They slipped over the pintle caps and onto the injector stems and felt like the same ID as the Miata ones, which fit loosely around the stems. When I pushed the injectors into the intake and put the rail on, the rail seemed to fit tighter like it was putting more pressure on the injectors. I attached a log and my .msq again. I drove it for like 20 minutes or more and I got 2 resets very close together. I did not have ECO correction turned on, but I did have overrun turned on. If I start the car when it's hot (heat soaked) it idles high and AFR is really lean. If I drive it awile and come to a stop sign, it'll idle high and AFR's are really rich. Possibly a Coolant-Related Air Density issue?
loaded.msq
log1.xls
loaded.msq
log1.xls
#10
Slowest Progress Ever
Thread Starter
iTrader: (26)
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 6,022
Total Cats: 304
That little pop that happens when I turn the key on sometimes...
The other night it blew off my boost gauge line. Is it possible that this coulda blew out a seal or something worse to cause my high idle crap?
The other night it blew off my boost gauge line. Is it possible that this coulda blew out a seal or something worse to cause my high idle crap?
#11
If I start the car when it's hot (heat soaked) it idles high and AFR is really lean. If I drive it awile and come to a stop sign, it'll idle high and AFR's are really rich. Possibly a Coolant-Related Air Density issue?
Attachment 12600
Attachment 12601
Attachment 12600
Attachment 12601
Thread
Thread Starter
Forum
Replies
Last Post
stoves
Suspension, Brakes, Drivetrain
5
04-21-2016 03:00 PM