Intermittent bogging - 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 12-18-2008, 10:53 AM   #1
Elite Member
Thread Starter
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default Intermittent bogging

Over the last week my NB has developed an intermittent bogging problem. When cruising on the highway all of a sudden it's like the car goes into a sort of a limp mode, another way to describe it is it feels like something grabbed hold of the rear of the car and is holding me back. To get it to clear up I find that if I shut off the ignition all the way for about 10 seconds its better when I restart. All mods are in my sig. I did just replace the timing belt a few weeks ago but I can't see how it could be related.

TIA.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 12-18-2008, 11:09 AM   #2
I'm Miserable!
iTrader: (1)
 
Join Date: Oct 2005
Location: Columbia, SC
Posts: 858
Total Cats: 0
Default

TPS maybe? My car does something somewhat similar at very low speeds. Im thinking maybe the TPS reads 0 for a split second. The car definitely goes lean at the same time.

Do you have a WB02?
SloS13 is offline   Reply With Quote
Old 12-18-2008, 11:10 AM   #3
Elite Member
Thread Starter
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by SloS13 View Post
TPS maybe? My car does something somewhat similar at very low speeds. Im thinking maybe the TPS reads 0 for a split second. The car definitely goes lean at the same time.

Do you have a WB02?

No sir.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 12-18-2008, 11:18 AM   #4
Elite Member
iTrader: (10)
 
leatherface24's Avatar
 
Join Date: Dec 2006
Location: Pembroke Pines
Posts: 4,033
Total Cats: 2
Default

change the plugs if you havent already.
leatherface24 is offline   Reply With Quote
Old 12-18-2008, 11:26 AM   #5
Elite Member
Thread Starter
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by leatherface24 View Post
change the plugs if you havent already.
Brand new NGK's.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 12-18-2008, 11:31 AM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

Isn't the NB notorious for failed coils..causing these sort of symptoms?
Braineack is offline   Reply With Quote
Old 12-18-2008, 09:55 PM   #7
I'm Miserable!
iTrader: (5)
 
bryantaylor's Avatar
 
Join Date: Dec 2006
Location: jacksonville, fl
Posts: 1,720
Total Cats: 0
Default

almost sounds like a O2 working, then not working
bryantaylor is offline   Reply With Quote
Old 12-18-2008, 11:08 PM   #8
Junior Member
iTrader: (7)
 
Join Date: Mar 2007
Location: Texas Panhandle
Posts: 213
Total Cats: 0
Default

Since this is a new car and you don't know if the CEL is working check the codes.

My 97 had a weird bogging problem, because of a oily crank sensor. I know the NBs have the same sensor. Same exactly feeling you are talking about like someone was just holding it back, and it was always random. Its possible you bumped it while working on the car. There is a measured distance it is suppose to be from the trigger wheel.
jsisco is offline   Reply With Quote
Old 12-19-2008, 12:02 AM   #9
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

Could be a fuel pressure problem. Can you tap a gauge into your fuel rail set-up and run it up to the windshield to watch it when the fault happens?
olderguy is offline   Reply With Quote
Old 12-19-2008, 04:55 PM   #10
Former Vendor
 
Join Date: Jun 2006
Location: Bell Tuning & Performance
Posts: 1,338
Total Cats: -78
Default

Quote:
Originally Posted by jsisco View Post
My 97 had a weird bogging problem, because of a oily crank sensor. I know the NBs have the same sensor. Same exactly feeling you are talking about like someone was just holding it back, and it was always random. Its possible you bumped it while working on the car. There is a measured distance it is suppose to be from the trigger wheel.
That would be my suggestion too. Check all the wires to the CAS, an exposed wire or a short would cause this exact symptom.

I don't think it would be a coil pack. Those will usually cause a misfire at idle too. (on an NB)

Check the air filter for crap and/or debris.
Stephanie
Stephanie Turner is offline   Reply With Quote
Old 12-19-2008, 04:58 PM   #11
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

Quote:
Originally Posted by Stephanie Turner View Post
Check the air filter for crap and/or debris.

Braineack is offline   Reply With Quote
Old 12-19-2008, 06:24 PM   #12
I'm Miserable!
iTrader: (5)
 
bryantaylor's Avatar
 
Join Date: Dec 2006
Location: jacksonville, fl
Posts: 1,720
Total Cats: 0
Default

i bet the air filter has peanut butter in it.
bryantaylor is offline   Reply With Quote
Old 12-19-2008, 10:54 PM   #13
Elite Member
Thread Starter
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by Stephanie Turner View Post
That would be my suggestion too. Check all the wires to the CAS, an exposed wire or a short would cause this exact symptom.

I don't think it would be a coil pack. Those will usually cause a misfire at idle too. (on an NB)
Check the air filter for crap and/or debris.
Stephanie

I did notice today that at idle the car does seem to have a random miss. The tack holds steady buy I can feel the vibrations in the car change. I did get concerned that it might stall but it didnt. Maybe it is a coil?

Its funny you mention that, cause I remembered the thread you made about that car bogging down and that was the 1st thing I checked.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 12-20-2008, 12:40 AM   #14
Elite Member
iTrader: (28)
 
Join Date: May 2008
Location: St. Augustine FL
Posts: 2,310
Total Cats: 2
Default

I had the same symptoms on my NA turns out i had a bad fuel pump/clogged fuel pump screen
p51hellfire is offline   Reply With Quote
Old 12-22-2008, 02:39 PM   #15
Former Vendor
 
Join Date: Jun 2006
Location: Bell Tuning & Performance
Posts: 1,338
Total Cats: -78
Default

Quote:
Originally Posted by levnubhin View Post
I did notice today that at idle the car does seem to have a random miss. The tack holds steady buy I can feel the vibrations in the car change. I did get concerned that it might stall but it didnt. Maybe it is a coil?
Does it occur in the same RPM range while driving it? If you can duplicate it over and over, chances are it is a CAS wire or sensor problem. This makes the car feel like you just lost all power and throttle control, but the car did not stall. Feels like it should though.

If it is intermittent and no pattern, it would most likely be the coil pack. A bad coil pack will make it miss all over the RPM Range. An easy way to check is move the coil pack to the other plugs and see if the misfire code switches cylinders. My car's coil pack went dead. It started missing every once in a while at idle. It slowly got worse. Changed coils and the misfire code moved from cylinder 4 to 2.
Stephanie
Stephanie Turner is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
FS/FT: 03.5 Mazdaspeed Protege leatherface24 Cars for sale/trade 15 10-16-2015 12:35 PM
An Old Driver but a newbie in Miata Patriarca Meet and Greet 17 10-13-2015 02:34 PM
Mazdaspeed miata FAQ mprhead5 Insert BS here 30 10-05-2008 01:37 AM
'94 BEGI S pre-4k bog sm2dan Prefabbed Turbo Kits 10 06-02-2008 11:41 PM
high rpm/boost issue? nicacus General Miata Chat 14 10-26-2007 09:35 AM


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 06:40 AM.