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Re: 98 3.9 v6 misfire under powered, sometimes | Joined: Aug 2018 Posts: 146 member | OP member Joined: Aug 2018 Posts: 146 | Change out the cat, its clogged .... if you can smell it ...its done,
More air thru more hp out That's my thoughts as well.
98 Dodge shorty hitop mark iv 95 Chevy van 20 regency hitop conversion van | | | Re: 98 3.9 v6 misfire under powered, sometimes | Joined: Aug 2018 Posts: 146 member | OP member Joined: Aug 2018 Posts: 146 | Well the brake system is proving to be a pain, the rear brake line broke and we couldn't get it to bleed since, now almost everything new the guy I have working on it determined the prop valve is bad, he couldn't get the check ball to reset for if one side loses pressure you don't lose all the fluid. The kicker is noone carries this part I found one online used for 200 bucks. Do any of you think an adjustable prop valve would be an okay or better solution to the factory prop valve? Can the prop valve be rebuilt? Does anyone have tricks for resetting the check ball? We tried suddenly cracking the fronts loose after they're pumped up no luck, tried banging on it like sometimes works on chevy prop valves. This is going to be a nasty bill after being in the shop all week for something that we thought would be as simple as hooking up a power bledder and being on our way.
98 Dodge shorty hitop mark iv 95 Chevy van 20 regency hitop conversion van | | | Re: 98 3.9 v6 misfire under powered, sometimes | Joined: May 2018 Posts: 2,397 Likes: 64 veteran | veteran Joined: May 2018 Posts: 2,397 Likes: 64 | Has it got an old style proportioning valve mounted on frame or does it run thru an ABS block,if old style this sounds stupid but with engine off stomp the brake pedal a couple times sometimes it will RE center.if it is thru ABS possible dump valve
When in doubt..get the sawzall out..
| | | Re: 98 3.9 v6 misfire under powered, sometimes | Joined: Aug 2018 Posts: 146 member | OP member Joined: Aug 2018 Posts: 146 | See we tried that, although my wife was running the pedal, but we tried that and cracking front. Bleeders hoping it would try and rdcenter that way. It is abs front or rear but not both.
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