low compression cylinder #6, 3.0 v6 1998 - Ford Truck Enthusiasts Forums

Ranger & B-Series All Ford Ranger and Mazda B-Series models

low compression cylinder #6, 3.0 v6 1998

Thread Tools Search this Thread
Old 07-18-2005, 08:36 PM
chrisw2099 chrisw2099 is offline
New User
Thread Starter
Join Date: Jul 2005
Posts: 1
chrisw2099 is starting off with a positive reputation.
low compression cylinder #6, 3.0 v6 1998

Hi, brand new here so hello to everyone. I was just about to sell my truck, in fact my wife had already paid to have it listed. Before I got a chance to get the pre transfer smog done (California thing) the engine light came on. Took it in to get it checked and it turned up codes PO304 PO306. Shop tested plugs and wires and recommended them changed. Gave them the go ahead and they started on it. Checked compression while doing tune up and they said the #6 cylinder has low compression, 60 PSI. Thought maybe some carbon was sticking a valve so they tried cleaning it with chemicals, didn't help. They are saying it is most likely a burnt valve. They finished the plugs and wires and the #6 cylinder is still misfiring. Anyone have any experience with this? The mechanic himself said he hasn't seen this before on the 3.0 motor. Any other possibilities (hopefully cheaper ones) or am I stuck having to take the cylinder head off to check? This is a 1998 ranger 3.0 xlt ext cab 4x4 with 128,000 miles. Thanks for any help you can give. Also I don't have much in the way of tools so I'm afraid I can't check too much out myself.
Reply With Quote
Old 07-19-2005, 08:32 PM
jimw411's Avatar
jimw411 jimw411 is offline
Elder User
Join Date: Nov 2004
Location: Ventura ,ca. (near L.A.)
Posts: 759
jimw411 is starting off with a positive reputation.
I would reset the computer and see if you can squeek by on smog and get it sold without the light turning on. Other then that, you most likely need a valve job, or you can just trade in the truck. they would check if the light is on or another thing.
Reply With Quote
Old 07-20-2005, 02:46 PM
rangerford rangerford is offline
Freshman User
Join Date: Jan 2004
Location: New Hampshire
Posts: 33
rangerford is starting off with a positive reputation.
Always wondering about someone else turning wrenches on my vehicle the first thing that I would check is that the spark plugs are torqued to the right specs and that the threads for the #6 cyl. are ok. Be very carful not to overtighten the plugs since they are threaded into aluminum. Other than that if you have an internal engine problem you could take the instrument cluster out and pull the bulb for the check engine light and ship the truck.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
04 6.0 with NO compression on 6 Cylinders, Why? sosasser 6.0L Power Stroke Diesel 74 12-19-2014 06:40 AM
E 150 code question? MNS 1997 - 2003 F150 9 07-17-2013 08:10 PM
1998 4.2 V6 Low Compression Cylinder #2 cnoud22 1997 - 2003 F150 17 01-23-2013 12:42 PM
Questions for passing smog 1977 F-100 Pad2383 1973 - 1979 F-100 & Larger F-Series Trucks 15 11-04-2012 01:30 AM
how do i tell if its the rings or valves making low compression dufrain Ford Inline Six, 200, 250, 4.9L / 300 2 08-30-2003 07:27 PM

Go Back   Ford Truck Enthusiasts Forums >

1996, 1999, 30, code, compresion, compression, cylinder, engine, ford, low, minimum, po306, ranger, speciflications, v6

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

Forum Jump

All times are GMT -5. The time now is 10:05 AM.