Fired up the new setup/engine, weird issue - Page 13 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 02-22-2014, 02:37 PM   #241
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Grab a fresh datalog.
Reverant is offline   Reply With Quote
Old 02-22-2014, 03:18 PM   #242
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,924
Total Cats: 526
Default

... you put the new cam in and it still doesn't run?

Aww man that sucks. It doesn't make any sense at all... Still didn't run with stock ECU right?
turbofan is offline   Reply With Quote
Old 02-22-2014, 03:20 PM   #243
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

stock ecu, stock injectors, pump gas.
I'll get another log I guess.
18psi is offline   Reply With Quote
Old 02-22-2014, 03:30 PM   #244
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Quote:
Originally Posted by 18psi View Post
stock ecu, stock injectors, pump gas.
I'll get another log I guess.
MAF hooked up?
shuiend is offline   Reply With Quote
Old 02-22-2014, 06:03 PM   #245
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

yessir.

I'm gonna swap the cam angle sensor yet again for yet another good one. I have gone through literally 100% of the car by now. Only thing left is wiring and electronics.
18psi is offline   Reply With Quote
Old 02-22-2014, 06:24 PM   #246
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Quote:
Originally Posted by 18psi View Post
nope. I'm at a loss. it has fuel, it has spark, it has good compression (did compression test), everything mechanically is flawless. Literally everything.
Fuel
Spark
Compression
Time
It's missing something.

Did you change the plugs?

Install the MegaSquirt. It has much better diagnostics capabilities than the stock ECU. Take a datalog and composite log.
Ben is offline   Reply With Quote
Old 02-22-2014, 06:35 PM   #247
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

Fuel - check
Spark - check
Compression - check
Time? You mean timing? Pretty sure that's good too.
Plugs - check. Replaced with non-fouled ones from another engine

Ok, will do.

Anyone have a MS3 msq/map for a bone stock 2001?
18psi is offline   Reply With Quote
Old 02-22-2014, 06:38 PM   #248
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Time, like the timing of everything. If the fuel doesnt inject at the right time it should still start, if the cams dont open at the right time it wont run, if the spark timing is off it wont run.
Leafy is offline   Reply With Quote
Old 02-22-2014, 07:03 PM   #249
Elite Member
iTrader: (12)
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,868
Total Cats: 66
Default

I'm betting it's something small that will make Vlad feel like a fucktard when he finds it
Doppelgänger is offline   Reply With Quote
Old 02-22-2014, 07:25 PM   #250
Junior Member
 
Join Date: Jan 2010
Location: Anderson, SC
Posts: 149
Total Cats: 6
Default

Didn't know you'd done a compression and leak down already.

Yeah, I guess you're looking at testing all the pertinent wiring and checking grounds.
sharkythesharkdogg is offline   Reply With Quote
Old 02-23-2014, 02:55 AM   #251
Elite Member
 
Chiburbian's Avatar
 
Join Date: Feb 2008
Location: Gilberts, IL
Posts: 2,158
Total Cats: 131
Default

Just another thing to check... have you tried starting the car with part throttle?

If you have a problem with your idle valve or idle valve wiring you might be able to start the car by applying part throttle. That would help eliminate variables. Just a thought.
Chiburbian is offline   Reply With Quote
Old 02-23-2014, 03:00 AM   #252
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

Yep, tried that too.

What is KILLING ME is the fact that this exact engine, fired right up and ran before I yanked the cams to do valve lash.
18psi is offline   Reply With Quote
Old 02-23-2014, 03:04 AM   #253
Elite Member
 
Chiburbian's Avatar
 
Join Date: Feb 2008
Location: Gilberts, IL
Posts: 2,158
Total Cats: 131
Default

This is going to sound really really dumb, but did you forget to connect the ground wire to the back of the head? (or damage it while pulling the valve cover?)
Chiburbian is offline   Reply With Quote
Old 02-23-2014, 03:09 AM   #254
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

The one on the injector harness? Nope, its on there perfectly. As is the one on the tb. As is the one from the block to the frame rail by the exhaust manifold.
but I'll double check again lol
Keep the ideas coming though, trust me I'm listening and thankful for whatever help/ideas I get
18psi is offline   Reply With Quote
Old 02-23-2014, 04:57 AM   #255
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

How about the main ground strap that goes from the head (maybe block or bellhousing?) to the bolt by the master cylinder? I missed that one when I put the heads back on my truck. Drove me ******* bonkers trying to get it started.

Last edited by EO2K; 02-24-2014 at 12:31 PM. Reason: CRS
EO2K is offline   Reply With Quote
Old 02-23-2014, 05:18 AM   #256
Elite Member
 
Chiburbian's Avatar
 
Join Date: Feb 2008
Location: Gilberts, IL
Posts: 2,158
Total Cats: 131
Default

I am thinking, considering that the problem all started after you did your head work, pay extra attention to anything that you modified, moved, touched, looked cross eyed in the process of your work.
Chiburbian is offline   Reply With Quote
Old 02-23-2014, 12:10 PM   #257
Junior Member
 
Join Date: Jan 2010
Location: Anderson, SC
Posts: 149
Total Cats: 6
Default

Any other major grounds, not in the engine bay, that could make this happen? Could some of the ECU harness wires been damage from swapping ECUs around? Have you done a continuity test on all the wires involved in getting spark signal and all that jazz to the ECU?
sharkythesharkdogg is offline   Reply With Quote
Old 02-23-2014, 06:05 PM   #258
Senior Member
iTrader: (5)
 
Join Date: Jul 2005
Posts: 715
Total Cats: 53
Default

Did you put the square top intake on at the same time? Any way it might have a rag in it? How about the vacuum line to ECU (I guess that doesn't matter with stock). Fuel pump fuse? With the stock ECU back in there, does the stock fuel pump fuse gave to go back on (ST-SIG, not sure if the 2001 has it to or not). You have not forgot to connect the fuel lines or perhaps have them backwards (I have seen it before!)
You do have power at the injectors (I am guessing 2001 injector harness has its own plug as well, so checking to see if the plug is connected). Is it possible the valve lash is too tight and keeping valves open? That could explain the backfire through intake too. I'm just throwing things at it now that I can think.
bcrx7 is offline   Reply With Quote
Old 02-24-2014, 12:07 AM   #259
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,924
Total Cats: 526
Default

Watching anxiously for this thing to run. Sux man. Good luck.
turbofan is offline   Reply With Quote
Old 02-25-2014, 12:16 AM   #260
Destroyer of Inconel
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954
Default

Quote:
Originally Posted by 18psi View Post
What is KILLING ME is the fact that this exact engine, fired right up and ran before I yanked the cams to do valve lash.
What exactly did you touch when you did the lash?

Is it possible that you have a chunk of whatsit that came from wherever stuck in the VVT actuator, or that it could have possibly moved down the line and its now affecting oil flow and regulation for the whole VVT system? Stuck at the cam or in one of the passages? I haven't looked for a flow diagram, but where does oil go after the VVT hardware gets done with it?
EO2K is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
Bizarre connection issue? nick470 MEGAsquirt 1 09-30-2015 11:32 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM


Tags
2nd saddest thread oty, bloody tamp, gnome sabotage, rage, ragequit

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:22 AM.