regular old m60 swap

[dothadance]

crankshaft sensor fixed it... lol. kinda spooked me actually when i went for a drive and revved her up, didn't expect it to actually work. Sh'es driving better than ever now!

[dothadance]

if this doesn't fix it, idk wtf i'm gonna do. it would either be in the harness or mechanical, as every sensor will now be within spec.

[dothadance]

A lot of tinkering these past couple weeks. Checked resistance of: IAT, CMP, TPS, coolant temp sensor, all within spec. Checked again, all eight coil packs have equal resistance. Cleaned the ICV, removed the wedge on the throttle plate, replaced a vacuum cap on the throttle body, and installed a new fuel pressure regulator vacuum hose. Tested the resistance on the crankshaft sensor, 396 ohms...... everything that i've been seeing says it's SUPPOSED to be 560ish. I've only ever seen that ckp's are either good or bad, but when a ckp is bad the car wont run... But the resistance is weird and that would kind of explain the weird stuff i've been experiencing, so a new one is on the way.

AAAANNNDD

I installed a 3.25 LSD that i swapped from my roommates e28!! This thing is so fresh, absolutely zero slop! Such a good deal.

[dothadance]

redownloaded the e34 bentley. idk why i've been attacking this so stupidly. troubleshooting like an intellectual tomorrow.

[dothadance]

Poking around my engine bay a few days ago I found the vacuum hose from my fpr was cracked. Replaced with another piece of vacuum hose to no avail. I've even swapped out a spare maf and stock 404 ecu I had laying around. Nada. It's gotta be electrical. Sent from my BND-L34 using Tapatalk

[dothadance]

Fuel pressure at idle is 42 psi and climbs up towards 50 at wot. In the video I hung at 3/4 throttle for a second before going wot, hence the way the rev limit changed a little bit. . http://cloud.tapatalk.com/s/5e77b975...322_141344.mp4 Sent from my BND-L34 using Tapatalk

https://www.dropbox.com/s/k5u1zdtzllhplg0/VID_20200322_141035.mp4?dl=0

[dothadance]

What chip is currently in it? With the stock chip, if the DME doesn't recieve a VSS, it will engage the top speed governor at 5200rpm.

I'm doubting that's the issue since you noted a 4500rpm miss, but just something to keep in mind.

I'd get the fuel pressure tester back on there.

markd, wouldn't purchase from him again.

I'll hopefully be able to knock out some more tests here soon.

[JGood]

What chip is currently in it? With the stock chip, if the DME doesn't recieve a VSS, it will engage the top speed governor at 5200rpm.

I'm doubting that's the issue since you noted a 4500rpm miss, but just something to keep in mind.

I'd get the fuel pressure tester back on there.

[dothadance]

a few days ago i was able to get some time on the car, took my multimeter to all my coils (all tested between .4 and .8 ohms), checked all my spark plugs (good even wear), checked fuel pressure (low fuel pressure). My fuel pump was a cheap replacement that i installed ~7 years ago, so i went ahead and installed a new one along with a new filter. Haven't tested pressure since, but i no longer have the intermittent dying issue, and my car seems to pull like never before. That being said my car still misses 4500 and up, and still has the 5kish rev limit. no cel.

[JGood]

Sounds like a lack of fuel pressure to me. I had essentially identical symptoms multiple times as I worked through fueling issues on my m60. Pretty easy to T into the supply line at the rail and go for a drive.

[dothadance]

Don't remember the specifics, but how old are your coils? Are you OBDI or II? If OBDII you should be able to pull misfire counts from the DME and figure out which cylinder(s) is having problems.

OBD1, and I'm pretty sure the coils are original to the engine, lmao. I'll let y'all know how it goes tomorrow! Sent from my BND-L34 using Tapatalk

[The Dark Side of Will]

Don't remember the specifics, but how old are your coils?
Are you OBDI or II? If OBDII you should be able to pull misfire counts from the DME and figure out which cylinder(s) is having problems.

[dothadance]

car has been running fabulously for the last year or so, doing some touch ups here and there, nothing crazy. but about a week or two ago i noticed a slight misfire and my engine limiting itself to about 5200 rpm, and i can feel it start to struggle around 4500, and instead of a WABOBOBOBOBOB, the limiter is more like a wob-wob-wob-wob. if that makes sense... hahaha. And the last two times i drove it it did this weird thing where it seems like a power blip where she just dies for a split second almost like she shorts out. Both times were different days, one off throttle and one on, neither were at particularly high rpms. not sure if the two issues correlate, but i would have to assume that they do. ive been out of town for two weeks and was hoping to get some potential insight before i get back and start digging in..

My current plan of attack:
shoot the exhaust manifolds with my ir thermometer to ensure each cylinder is firing properly
pull the plugs and make sure even wear.
check fuel pressure

[dothadance]

leakdown tested today and everything was sub 35%. Maybe i'm just being paranoid...? idk sometimes it feels fast sometimes it doesn't. i'll worry about it again once i get a proper diff.

[jpod999]

I have 1263 as well for purge valve.
I've tried multiple different resistor values on those ECU pins, and i haven't had any luck clearing it. I have an actual purge valve i guess i might just try to wire into the glovebox see if that works.

That's the only code I have as well and I was thinking of doing just that- wiring in the purge valve itself so that the DME sees it.