Blasphemy101's E30 Build Thread

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blasphemy101
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Tue Aug 12, 2014 5:49 pm

Well, the car is definitely leaning out, and my datalogs (injector pulsewidths, RPM, MAP, MAT) all look fine, so I'm thinking it's fuel-related. I have a pressure tester, but I've just been lazy. The oil leak has drained a lot of desire to drive the car, so it hasn't been getting too much love. It's stupid, I know.

I drove it to pick up a pair of cool wheels for my S2000, so I think it's mad at me...

Oh yeah - ISSUE #3076: the new turbo makes my exhaust hang way too low again. Time to redo it again... I'm going to try and talk a friend with a lift into letting me in his garage for a weekend, so I can do it right. If it turns out well, I might try making something for my S2000 for fun. I'm getting tired of my fart cans...
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Tue Aug 12, 2014 6:22 pm

Lean doesn't necessarily mean lean. It could be unburnt so bad that it's reading lean. But yea. Hoof beats, horses. Not zebras.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Tue Aug 12, 2014 6:53 pm

Fair point - it's an oxygen sensor, not a burnt fuel sensor. I should have everything I need to track this down, I've just been so lazy lol
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Thu Sep 04, 2014 5:02 pm

Yoshi wrote:Lean doesn't necessarily mean lean. It could be unburnt so bad that it's reading lean. But yea. Hoof beats, horses. Not zebras.


blasphemy101 wrote:Fair point - it's an oxygen sensor, not a burnt fuel sensor. I should have everything I need to track this down, I've just been so lazy lol


I decided to finally make some progress over the long Labor Day weekend. Fuel pressure checked out fine. My crazy noisy fuel pump is still hanging in there!

I believe I've tracked the problem down to a misfire - I hadn't driven/revved the car since limping the car home, but their is a definite miss. I went through unplugging the spark plug wires and traced the miss down to cylinder 5. I suspected the misfire was due to the failure of one of my big new injectors. I bought a V8 set, so I just swapped the injector out for a new one. No change...

While fiddling with the spark plug wires, I realized I could get the engine to run fine by unplugging the #5 wire from the distributor and just holding the wire into the socket, letting the contacts arc to each other. Plugging the wire in or moving it significantly caused the misfire to reappear. I tried this with another wire from an old set, and I was able to replicate the issue. It looks like something has happened to the #5 connection on the distributor. Luckily, I have my old distributor, so I should be able to confirm...

I also pulled all the insulation out of the passenger cabin (trunk insulation will come out soon) in an effort to track down and take care of all the rust.
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Thu Sep 04, 2014 6:19 pm

First thing I do with any M20 is to fully replace all ignition components. Sucks yours broke despite it being new.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Thu Sep 04, 2014 6:53 pm

Yoshi wrote:First thing I do with any M20 is to fully replace all ignition components. Sucks yours broke despite it being new.


Yeah - that distributor probably has less than 15k on it...

Pictures of the insulation removal. It was so hot here that most of the insulation came up by hand with a little persuasion from the scraper. The harder sections (front driver/passenger) got some help from the heat gun, and the adhesive wipes up easily after soaking in a little WD-40.

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I apologize for the bad pictures... My phone has been through a lot lol
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Re: Blasphemy101's E30 Build Thread

Postby M20_fever » Fri Sep 05, 2014 2:47 am

I remember going through all that, what a PITA.
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Re: Blasphemy101's E30 Build Thread

Postby Terry » Fri Sep 05, 2014 4:17 am

My trunk insulation came out just using my fingers on a 100 degree day. I'm hoping it's the same for the interior...
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Fri Sep 05, 2014 12:23 pm

I don't recall all that insulation weighing more than 2lbs. Wasn't worth it IMO.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Fri Sep 05, 2014 3:25 pm

It really hasn't been to bad. Anything that was sitting in direct sunlight came up super easy, because the glue was melting. After going over the bits in the front that were in the shade, I can imagine it would be pretty tough to do in any normal climate.

According to my bathroom scale, all the insulation in my cabin - minus whatever is behind the rear seat back weighed 14 lbs. I definitely wouldn't do it if I didn't have any rust to deal with.

WRONG Found my misfire problem - fouled spark plug on cylinder #5. That's concerning... WRONG

The car is running great, but now my tune is all out of whack. I've rolled back to a previous tune I had saved. I'm going to drive it around tonight and hopefully get the low end of my map dialed in.
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Re: Blasphemy101's E30 Build Thread

Postby blasphemy101 » Fri Nov 28, 2014 4:25 pm

I keep forgetting to update this thread... The problem turned out to be tune related. Something went wrong with my mobile tuning app, and the REQ_FUEL setting got screwed up some how. I wound up resetting it with my laptop, and all is well again.

The car is great at 10 PSI. I took it drag racing again at a 1/8 mile track. The car is slower (mid-8.x seconds), but feels much faster on the street. Honestly, I don't think I need any more power for what I use the car for. I've corded my auto-x tires. Hoosiers inbound. I love driving the car, but I NEED to tighten the front end up. Pick & Pull is having a half-off sale over the weekend, so I'm going to try to grab a steering rack.
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Re: Blasphemy101's E30 Build Thread

Postby Ryki » Fri Nov 28, 2014 5:46 pm

Here's to a lucky find!
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Re: Blasphemy101's E30 Build Thread

Postby Yoshi » Fri Nov 28, 2014 7:10 pm

Fucking tunes. Hate fucking tunes >_<
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