2 Attachment(s)
Originally Posted by Braineack
(Post 1189615)
because 1.8Ls have a heat range of 5 stock, and there's no reason to jump 2 heat ranges.
I'd run the hottest plug you can get away with. Also just in case i checked my cam timing to see it if possibly slipped a tooth and it did not. I learned how to take better data logs and here is my most recent. |
Well I ran the BKRE5ES gaped at .030 and it did not make a difference... could it be the megasquirt having a software or firmware issue?
|
BKR6E-11
They are about $2 apiece. What you have above is not a BKR6E-11. I still think your tune is part of the problem. Your accel enrichment is WAY too high. Every time you touch the throttle in the logs your AFRs go to 10.2-10.3. That will flood out a marginal spark. Get the right plugs and gap down to .025-.028 MAP sensor choice-- I don't think I ever got down to 12.4 KPA on decel with my car. That makes me wonder if you have the right selection for the MAP sensor that is in your MS. I still think you have the wrong plugs, weak stock coils, still gapped a bit too wide, overly rich accel settings, and possibly selected the wrong MAP sensor in TS (there are several choices and it is easy to do). That's my best guess so far. |
I watched your videos. it's more likely a tuning issue.
I will say, last time my car acted like that I had water on the spark plugs (washed engine bay) and it was making my spark signal weak in boost. But yeah, i still wouldn't run resistorless plugs with a MS. Members in the past have reported having tons of electrical issues when doing that. |
I bought the BKR6E-11 plugs gaped at .025 and then in tuner studio I removed a lot of throttle enrichment and got the afr's while pressing the throttle down to 12.0-12.5
the MAP sensor is the one that comes in the ecu and I used the constants that DIY Auto Tune provided with my ecu. with doing all of that the car seemed to pull harder (possibly because of not running so rich) but still when it hits more than 5 psi of boost or so it starts to missfire and rpms do not increase if you stay in the gas. compression numbers were 150, 140, 135, 140 (running 8.6:1 comp pistons). do I need Bigger ignition coils? |
Well I did even more testing this weekend and this time I reaclibrated the O2 sensor, changed my tps, used the tune that DIYAUTOTUNE supplies with the ecu software cd. went out for a drive with the ve-analize running to make sure the ve table was being tuned to the afr table. and after a few miles of varing speed and entering low boost (0-3psi) I attempted to go a little higher into boost and it just started breaking up.
Before you tell me to change my plugs again i am running the exact ones you guys recomended BKR6E-11. gapped to .028 my coils tested good ( and i have swapped them out with other known good ones) my fuel system is definatly up to par and my sensors are all working properly, my cams are timed correctly and my compression is what is has always been. so I plan to send the ecu back to get tested, i had a bad injector driver in the past so it is possible to have it go bad again. Thanks for your help guys I will let you know what happens |
I'm only a noob at tuning but in the summer when I got my car going and tuned by my friend and I we had something very similar in sound. Turned out that auto tune couldn't adjust quick enough and was running very rich. We had to modify the VE table not in auto tune. Cleared it right up. Just a thought.
|
Originally Posted by Rob80
(Post 1191033)
I'm only a noob at tuning but in the summer when I got my car going and tuned by my friend and I we had something very similar in sound. Turned out that auto tune couldn't adjust quick enough and was running very rich. We had to modify the VE table not in auto tune. Cleared it right up. Just a thought.
OP get rid of that pig rich spike to 10.0 when you jab the throttle. Also. Is your rear bumper all covered with black soot? |
Originally Posted by Erat
(Post 1191035)
I also had this.
OP get rid of that pig rich spike to 10.0 when you jab the throttle. Also. Is your rear bumper all covered with black soot? |
Ahh duhh e85. Total brain fart.
|
OP's username is confusing me more than it probably should.
|
2 Attachment(s)
here is a data log from a few minutes ago logged in 4th gear and slowly getting on the throttle
|
Originally Posted by ThePass
(Post 1191059)
OP's username is confusing me more than it probably should.
|
Ahem.......you haven't changed to ARP head studs have you?
We had a similar problem you describe.......engine builder followed ARP instructions even though he thought it read high..... we have the exact same compression figures you have on our brand new motor. our symptoms were a little different..but the instructions provided with ARP studs (from 949racing) were nearly double the torque required on our motors. We believe it ovaled the bore, and probably ruined our newly rebuilt head...but have been to busy setting up and tuning the loan motor to pull it down and check. may be wrong but thought it worth mentioning. |
In your log at 4814.689 seconds it shows you are at 100kpa at 3530rpm at a very low throttle position. It shows you to have 12.2AFR there, which is still pretty rich. But I question if you really have 100kpa there. I still think you have the incorrect MAP sensor selected in your project setup menu.
Try an experiment for me. With the car off, turn the key to the "on" position and read in TS what the kpa reading is for us. And tell us your approximate altitude above sea level. |
i had what felt like a miss fire and i was dumb it was over boost protection kicking in... hahah rasied the value that fixed it ;)...
|
Originally Posted by mx5-kiwi
(Post 1191105)
Ahem.......you haven't changed to ARP head studs have you?
I did the test and I got 91.6 KPA at a level of approximately 790 feet above sea level. i may have the wrong map sensor im not entirely sure. And im sorry if my user name "jackson racing" offends you but honestly if it does i dont give a S#** because my last name is jackson and i do a lot of racing. Thanks for the help guys i really appreciate it. i am new (by new i mean only been building this car for two years) to fuel injection. |
You better search "miata Arp head studs" you will most likely experience that same sinking feeling we did...I think the warnings are 45 max...or similar.
We are about to tear ours down and measure up for any permanent damage. |
Originally Posted by mx5-kiwi
(Post 1191586)
You better search "miata Arp head studs" you will most likely experience that same sinking feeling we did...I think the warnings are 45 max...or similar.
We are about to tear ours down and measure up for any permanent damage. |
91.6 KPA corresponds to about 2400 ft above sea level, and not 790.
Select the correct MAP sensor in tunerstudio and you will end up with much better fuel metering. |
All times are GMT -4. The time now is 03:59 PM. |
© 2024 MH Sub I, LLC dba Internet Brands