Notices
General Miata Chat A place to talk about anything Miata

stumbling, jumpy, and rough idle

Old Jul 6, 2009 | 02:16 AM
  #1  
p51hellfire's Avatar
Thread Starter
Elite Member
iTrader: (28)
 
Joined: May 2008
Posts: 2,299
Total Cats: 2
From: St. Augustine FL
Default stumbling, jumpy, and rough idle

Never wanted to post this but at this point I can't fix it myself.
So the problem I'm having is that during idle every couple of secs the car drops up to 200 rpm and bobbles about. It sounds like it's missing. During cruising it begins to get jumpy like a push pull felling not through out entire range mainly when I'm in third doing 45 and it's around 3500 rpms. Now I've thought of many things (CAS, fuel delivery, INJ's, timing, spark plugs and wires, coil packs, and pretty much my wannabe tune).
*Plugs are not old and gapped correctly I believe-1mm
*Plug wires no more than 12k on them and are NGK
*Just changed fuel filter and fuel pump filter
*Timing is at 10*
*Had a lot of rust in fuel tank, so I presume my injectors may be f'ed
Just let me know what you think I should check/ adjust.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
Sep 30, 2018 01:09 PM
jpreston
Miata parts for sale/trade
2
May 17, 2016 12:51 AM
The Gleas
MEGAsquirt
3
Oct 1, 2015 09:30 AM
interestedofold
Suspension, Brakes, Drivetrain
5
Sep 29, 2015 01:42 PM
JStoops
Miata parts for sale/trade
0
Sep 28, 2015 05:35 PM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 07:03 PM.