Not getting any help anywhere else. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 03-20-2008, 12:29 AM   #1
Guest
Thread Starter
iTrader: (-2)
 
Join Date: Nov 2006
Posts: 145
Total Cats: 0
Default Not getting any help anywhere else.

i have a 95 that im having problems with.

i can pin the car at WOT whether sitting still or driving and bogs all the way down to where it starts misfiring off it sounds like 3 cylinders
it hesitates under any slight aggressive throttle touch i cant even roll into it hard it makes this poppy sound like its misfiring or not firing at all and the revs drop slowly if i hold it..if i let out it will run normal again this is a daily driver and i wouldnt have posted here if i could get an answer anywhere else...
cr.net isnt doing me any good
and neither is m.net
getting a #1 code
#1-Ignition Signal

plugs-new
wires-roughly only 9-10k miles on them
MAF-new
coil pack-new

gladly appreciate any help
NAshowdown95 is offline   Reply With Quote
Old 03-20-2008, 12:32 AM   #2
Elite Member
iTrader: (11)
 
Trent's Avatar
 
Join Date: Feb 2006
Location: Louisiana
Posts: 1,625
Total Cats: 5
Default

Have you searched that code? Could be a problem with the CAS.

Check your grounds. The main grounding strap on the driver's side of the engine. Also check the ECU grounds on the back of the head. (At least that's where they are on a 1.6. I'm honestly not sure where they are on a 1.8.)

Also, how is your vacuum? Does the car idle okay?

Was this a clear out of the blue problem, or did it happen after making any changes to the car?
Trent is offline   Reply With Quote
Old 03-20-2008, 12:34 AM   #3
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Normally I would say you're experiencing a lean condition.
Are you NA? Is the car basically stock? If not what type of fuel management of EMS are you running. Need a little more info. If your ignition system is all new then that shouldn't be a problem. Does the car run just fine when you're not hammering on it? Have you cleaned up all of your electrical connections, primarily your grounds, including the battery.
cjernigan is offline   Reply With Quote
Old 03-20-2008, 12:45 AM   #4
Elite Member
iTrader: (21)
 
paul's Avatar
 
Join Date: Jun 2006
Location: Point Pleasant, NJ
Posts: 2,957
Total Cats: 2
Default

easy one. its the stock FPR on the fuel rail. try clamping the return fuel line closed and taking it for a spin. if its better then your FPR isn't working properly. take it off, clean it, or replace it.

or cas
paul is offline   Reply With Quote
Old 03-20-2008, 12:51 AM   #5
Guest
Thread Starter
iTrader: (-2)
 
Join Date: Nov 2006
Posts: 145
Total Cats: 0
Default

its N/A no forced induction ever put on the motor ever..

it has simple bolt ons
intake
header
catback
stock fuel system and engine management
only 120k miles on the car
cleaned and regrounded all the engine grounds
this problem started just out of the blue
it idles fine and runs fine if i dont stab the throttle, i have to be UBER delicate with how much throttle i give or it bogs out and makes a poppy sound under the hood as if the fuel is igniting off the header.
NAshowdown95 is offline   Reply With Quote
Old 03-20-2008, 09:33 AM   #6
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

Clogged fuel filter or line?
rleete is offline   Reply With Quote
Old 03-20-2008, 09:49 AM   #7
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,236
Total Cats: 288
Default

That really, really sounds like a ground. My 91 did that w/o the chassis-to-engine ground connected. Anything past half throttle and it'd barely move BUT that was only under load. Free revving was fine. Have you put a timing light on it to see what the IGN is doing at the areas prone to misfire?
m2cupcar is offline   Reply With Quote
Old 03-20-2008, 10:15 AM   #8
Elite Member
iTrader: (2)
 
Newbsauce's Avatar
 
Join Date: Jul 2006
Location: NoVA
Posts: 2,304
Total Cats: 2
Default

Fuel system... Fuel pump.. FPR..filter.. run down the line.
Newbsauce is offline   Reply With Quote
Old 03-20-2008, 10:54 AM   #9
I'm Miserable!
iTrader: (1)
 
Join Date: Oct 2005
Location: Columbia, SC
Posts: 858
Total Cats: 0
Default

even though your wires are new, try some known good ones. Also take a look at your plugs to see what color they are.
SloS13 is offline   Reply With Quote
Old 03-20-2008, 11:45 AM   #10
Elite Member
iTrader: (2)
 
Join Date: Jun 2006
Location: ABQ, NM
Posts: 1,850
Total Cats: -8
Default

Start with the basics and narrow it down.

Are the pops coming out of hte intake? If so it could be a clogged cat.
Do you have fuel at all?
Are you getting spark at all?
Is the fuel filter clogged?
What's your base timing like?
What do the plugs look like?
Did this start happening after you changed something? Like the MAF?
List everything that was changed and the order you changed it, even if it doesn't seem related.
BenR is offline   Reply With Quote
Old 03-20-2008, 11:56 AM   #11
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

he replaced the plugs, coils, MAF after the problem started
i had him check the CAS ans cas harness, found one foul wire in harness, isolated it but problem still there, so thats not it
i think he ran a test on the CAS so i doubt thats it, but im not sure...

now that i think about it, i did have a similar problem about 4 years ago, new fuel filter did it.
the rattling sound could be ping/knock maybe, due to lean condition...
fuel filter is cheapest to replace, so i would start there
also, i have a spare fuel rail and FPR if you want to test that out...
let me know, ill be up there sunday
Zabac is offline   Reply With Quote
Old 03-20-2008, 12:10 PM   #12
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

What's the code you get if you forget to reconnect (or have a bad connection) at the MAF?

Mine stumbled like that, but I got it home and started checking, only to discover it wasn't snapped in all the way, and was making only partial a connection. Plugged it in firmly, and the problem went away.
rleete is offline   Reply With Quote
Old 03-20-2008, 12:12 PM   #13
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,854
Total Cats: 8
Default

he has code 1=ignition signal, i think this is a separate issue for him...just a bad ignition switch, nothing to do with car bogging, leaning out, stalling...
im leaning more to the fuel now
Zabac is offline   Reply With Quote
Old 03-20-2008, 12:16 PM   #14
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

Well, then I stand by my earlier diagnosis of clogged filter!
rleete is offline   Reply With Quote
Old 03-20-2008, 02:23 PM   #15
Guest
Thread Starter
iTrader: (-2)
 
Join Date: Nov 2006
Posts: 145
Total Cats: 0
Default

fuel filter and pump are only about a year old...
spark plugs are golden/brown
and i am getting power/signal from the ECU to the CAS i tested the harness connector so i dont believe its a wiring issue such as an open in the circuit and i cleaned and reground all the engine to chassis grounds
NAshowdown95 is offline   Reply With Quote
Old 03-20-2008, 02:31 PM   #16
Elite Member
iTrader: (10)
 
IcantDo55's Avatar
 
Join Date: Apr 2007
Location: VA Beach
Posts: 1,764
Total Cats: 18
Default

What about timing? Belt could have jumped, seen that before.
IcantDo55 is offline   Reply With Quote
Old 03-20-2008, 02:33 PM   #17
Elite Member
iTrader: (2)
 
Newbsauce's Avatar
 
Join Date: Jul 2006
Location: NoVA
Posts: 2,304
Total Cats: 2
Default

Hook up a fuel pressure gauge and clamp the line, that will tell you if the pump/filter are an issue. If that isn't it, move on to the FPR.
Newbsauce is offline   Reply With Quote
Old 03-20-2008, 02:36 PM   #18
Guest
Thread Starter
iTrader: (-2)
 
Join Date: Nov 2006
Posts: 145
Total Cats: 0
Default

Quote:
Originally Posted by IcantDo55 View Post
What about timing? Belt could have jumped, seen that before.
checked timing 2 days after the problem arose and timing is fine.
NAshowdown95 is offline   Reply With Quote
Old 03-20-2008, 02:47 PM   #19
Elite Member
iTrader: (10)
 
IcantDo55's Avatar
 
Join Date: Apr 2007
Location: VA Beach
Posts: 1,764
Total Cats: 18
Default

A jumped timing belt won't show up as bad timing.

Quote:
Originally Posted by NAshowdown95 View Post
checked timing 2 days after the problem arose and timing is fine.
IcantDo55 is offline   Reply With Quote
Old 03-20-2008, 03:02 PM   #20
Guest
Thread Starter
iTrader: (-2)
 
Join Date: Nov 2006
Posts: 145
Total Cats: 0
Default

well the reason im not worried whether or not it jumped a tooth is because ive experienced the car jumping a tooth and im confident id know if it did due to prior experience
NAshowdown95 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
UEFI boot help needed mgeoffriau Gaming 38 03-02-2016 04:59 PM
Built 1.6l Engine, 1,820 miles Baxgordum Miata parts for sale/trade 19 09-05-2015 12:42 AM
Anyone in San Jose area? wittyworks Meet and Greet 9 07-31-2009 01:45 AM
Konnichiwa from Japan Dust Meet and Greet 10 06-28-2009 04:40 AM
His & Hers diary entries rleete Insert BS here 14 09-21-2008 02:35 PM


Thread Tools

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 11:46 PM.