RPMS dropping at redlight - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

LinkBack Thread Tools Search this Thread
Old 11-28-2005
RockysFord's Avatar
Thread Starter
Join Date: May 2005
Location: Columbus Ohio
Posts: 2,782
RPMS dropping at redlight

Ok, when i come up to a redlight, and sit for a couple seconds, the idle drops from 750 or whatever its suppose to be at....to 500, then jumps back up...so when your sitting there, the truck will jump....My friend thinks its something with the heater because if its on...it will do it like 2 times per stop light...but if its off it doesnt do it....i did just put a system in a couple days ago, and it started after that i think, but the battery meter is fine...even when i turn the subs up it doesnt move....so i have no clue what it is, but its annoying as hell...

Reply With Quote
Old 11-28-2005
Join Date: May 2004
Location: McKinney, TX
Posts: 2,123
To start, check your MAF sensor, might need some cleaning. Throttle body would be next, and air filter should be an obvious check.

If it's purely electrical, check your battery for proper fluid levels, and/or charging. Both can be done for free at your local autozone, because they'll love to sell you a replacement.
Reply With Quote
Old 11-28-2005
bmwysocki's Avatar
Join Date: Nov 2005
Location: Chambersburg, PA
Posts: 61
I hate to say this cause I love my Fords, but honestly, for me, its been a Ford thing. Happened to my Mystique I had, then to my Mustang. I wouldn't be afraid to say that it could be an EGR valve going or an O2 sensor. Depending if you have that stuff hooked up. I would think the EGR would cause the motor to rev higher, but the O2 sensor causes the bad idle. Mine started like that and a few thousand miles later I got the check engine light on. Im not saying im right, but its a thought if you are driving yourself crazy trying to find a fix.
Reply With Quote
Old 11-28-2005
Join Date: Sep 2005
Location: Franklin Indiana
Posts: 87
I have had 3 rangers with a/c and when its on defrost or bi-level it will jump slightly because the ac compressor is cyclying, i just turn the **** on vent only and it dont do it.
my 2 cents.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
dropping ranger what shocks? poor_boy_custom Suspension Tech 8 10-01-2008 06:49 PM
dropping my 98 2wd 3.0 ranger wobawoba6969 New Ideas 17 01-06-2007 02:21 AM
Help with Dropping my ride kevdeg16 Suspension Tech 4 12-26-2006 06:42 PM
Dropping rear question slvr02 Suspension Tech 44 07-30-2006 02:02 AM
Dropping the Edge AllBlackStang New Ideas 10 06-14-2004 09:28 AM

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 -6. The time now is 11:51 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.