Results 1 to 8 of 8

Thread: 2500 RPM drop out (NB)

  1. #1

    Question 2500 RPM drop out (NB)

    So the Ranger took an extended break when the water pump let go so the garage queen 2002 Miata was pressed into daily service.

    It ran OK but would occasionally fall on its face at around 2,000 to 2,500 RPM while accelerating almost like someone shut it off. It wouldn't always do it but it did it enough to piss me off.

    No codes, and wasn't racking up any misfires so not sure where to start.

    Any thoughts or suggestions on what could be causing this dip??

  2. #2
    Chassis Designer Don_S's Avatar
    Join Date
    Sep 2015
    Location
    Fort Worth, TX
    Posts
    116

    Default

    Did it matter if it had warmed up or not?
    Shinsen #1198

  3. #3

    Default

    Quote Originally Posted by Don_S View Post
    Did it matter if it had warmed up or not?
    It was at operating temp.*

    *It does historically tend to be a lil cranky till she warms up.

  4. #4
    Team Cheap Bastard
    President & Founder
    sammm's Avatar
    Join Date
    Jan 2004
    Location
    NC
    Posts
    6,457

    Default

    How old are plugs/wires/fuel filter?

  5. #5

    Default

    Plugs are maybe 2 years old. Coil on Plug Setup. Coils were replaced about 5 years ago plug wires were changed the same time as plugs. Not 100% sure on fuel filter but it has been changed at least one.

    In the past 4 years, we have put less than 4,000 miles on the car. It has been pretty much retired to Autocross duty.

    We did, however, drive it down to Waco at over the posted Speed limits a couple weeks before it was forced back to daily use. It ran like a champ and gave us no issues.

    You'd think if it was a Plug, Wire, Coil issue I'd see misfires when I scan the car. But maybe not.

  6. #6
    Team Cheap Bastard
    President & Founder
    sammm's Avatar
    Join Date
    Jan 2004
    Location
    NC
    Posts
    6,457

    Default

    Since it sits around for extended periods, maybe throw a bottle of dry-gas (or whatever it's called these days) in it?

  7. #7

    Default

    Quote Originally Posted by sammm View Post
    Since it sits around for extended periods, maybe throw a bottle of dry-gas (or whatever it's called these days) in it?
    True but the gas in it is recent since we went to Waco it got a fresh supply of Shell 93 Octane just days before it was forced into daily service.

  8. #8

    Default

    Did it start acting up after the Waco gas? Any chance the new gas was bad? I would start with a new fuel filter.

Similar Threads

  1. Keep one, drop one
    By sammm in forum Bull
    Replies: 582
    Last Post: 10-06-2017, 02:44 PM
  2. oil pressure drop
    By mtrx804 in forum Miata Tech and Chat
    Replies: 19
    Last Post: 03-26-2010, 07:19 PM
  3. FS: Drop in Lexan window
    By channelmaniac in forum dfwMiata.com Classifieds
    Replies: 2
    Last Post: 08-12-2009, 08:19 AM
  4. Car and Driver tests Drop Tops
    By bnordin in forum Bull
    Replies: 2
    Last Post: 06-05-2009, 08:13 AM
  5. FS: K&N drop-in air filter for NA - $20
    By jrj512 in forum dfwMiata.com Classifieds
    Replies: 1
    Last Post: 12-30-2008, 01:21 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •