GrayWolf1691 Posted October 13, 2014 Share Posted October 13, 2014 So, about two months ago I put in a new map and tps sensor as well as a new fuel filter and for about a week and a half my truck was feeling pretty spiffy. Came to realize my fuel filter had been installed backwards and flipped her around and gained back most of my power... briefly. A day or two after I developed a ticking and at first couldn't identify if it was vacuum or exhaust leak so since they were pretty much trash anyway, I replaced the vacuum lines and my idle got smoother and the truck drove a little better. This last weekend figured out that the egr is trash so bypassed it completely. Running even smoother and loss of power takes a little longer to rear its head. My ccv from the valve cover to the manifold had snapped and so I linked it back together with rubber hosing and have been having enough blowby to get oil on the air filter and it's pushing oil into the rear ccv line causing the rubber to swell and the seal is no longer effective. I had capped off the manifold side but that really only improved smoothness in the idle and maybe while cruising but did take away power while accelerating. Which is the only time I experience loss of power... under acceleration while driving. I used to be able to cruise over my daily commuting hill at 60 mph I believe it's a 6% grade and I'm now losing about 15 mph and even dropping a few mpg's. Compression is 125-120-120-130 and has been that way since I got her. I am going to be getting the rear ccv line replaced, haven't found a direct replacement for it so decided I'd just use some silicone to seal in a hardline but I don't think that'll be the end of my problem. It feels like something is preventing enough fuel/air to enter the engine. And it kind of feels like I'm driving into a cushion of air when I am aggressive with the throttle, like it doesn't get that it should be pushing in more fuel and air. I am at my wits end and haven't found any similar problems that gave any more solutions than what I've done short of rebuilding and cleaning the throttle body unit. Oh, the air filter and O2 sensor are relatively new as well, and the fuel pump is still good. Link to comment Share on other sites More sharing options...
Jeep Driver Posted October 13, 2014 Share Posted October 13, 2014 Had your filter caught some sediment or debris, flipping it around and allowing the flow to reverse could have flushed out that sediment to the injector. Link to comment Share on other sites More sharing options...
Eagle Posted October 13, 2014 Share Posted October 13, 2014 Clogged catalytic converter? Link to comment Share on other sites More sharing options...
GrayWolf1691 Posted October 13, 2014 Author Share Posted October 13, 2014 Had your filter caught some sediment or debris, flipping it around and allowing the flow to reverse could have flushed out that sediment to the injector. I've previously had problems with it cutting out like it was starving for fuel but that cleared up after about a year and a half of ownership and 5 tanks of premium after finding out renix systems run better on it. But I've had my suspicions with it since the truck sat for 5 years shortly before I got it. Is there a way to clean the injector vs replacing it? Clogged catalytic converter? Nope, the cat is clear, I had checked that a while back, and found out why mufflers are installed... Link to comment Share on other sites More sharing options...
cruiser54 Posted October 13, 2014 Share Posted October 13, 2014 Perform a vacuum test for exhaust restriction. Tip 16. I've seen the guts of the converter melt into a ball and roll around inside, sometimes clogging the exhaust. That ground strap on the firewall needs to be in excellent shape in order for the sensors/ECU to do their job. The hoses to the intake manifold below the throttle body are notorious leakers. Worth looking at, as are the intake manifold bolts. Link to comment Share on other sites More sharing options...
GrayWolf1691 Posted October 13, 2014 Author Share Posted October 13, 2014 Perform a vacuum test for exhaust restriction. Tip 16. I've seen the guts of the converter melt into a ball and roll around inside, sometimes clogging the exhaust. That ground strap on the firewall needs to be in excellent shape in order for the sensors/ECU to do their job. The hoses to the intake manifold below the throttle body are notorious leakers. Worth looking at, as are the intake manifold bolts. I tighten the manifold bolts periodically and just figured out how to get to the underside bolts recently, one of them was close to falling out - wouldn't have been the first one either. I've also strapped on an inverter ground wire to better ground the engine, did that last year; when I get the time I'll also be cleaning the ground wire at the dipstick tube. I actually just got a new hose on the map sensor last night and tomorrow am replacing the one for the ccv. Um... how do I test for exhaust restriction? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 14, 2014 Share Posted October 14, 2014 Tip 16. Link to comment Share on other sites More sharing options...
GrayWolf1691 Posted October 14, 2014 Author Share Posted October 14, 2014 I have no way of accurately testing it - I don't have a tach and no one to help me with it. But it was running 16 pounds of vacuum at an idle... though from that section doesn't seem like a reliable way to tell if there is a problem since the problem occurs under power. Would it make a difference if it's being driven down the road vs sitting at an idle? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 14, 2014 Share Posted October 14, 2014 16 INCHES of vacuum. Don't worry about a tach. Not that critical. Just do the test. Link to comment Share on other sites More sharing options...
hillbilly51 Posted October 15, 2014 Share Posted October 15, 2014 16 inches of Mercury is approx 8 psi .......That's too low a intake vacuum for the engine at idle. It could cause all kinds of performance problems. steve Link to comment Share on other sites More sharing options...
cruiser54 Posted October 15, 2014 Share Posted October 15, 2014 Nah. 17 to 21 inches of vacuum is considered quite normal at idle. Link to comment Share on other sites More sharing options...
GrayWolf1691 Posted October 16, 2014 Author Share Posted October 16, 2014 Well, I never was able to figure it out but she just kept getting progressively worse and finally caved and sold her off. Thanks for trying to help guys. Link to comment Share on other sites More sharing options...
Zebvance Posted October 16, 2014 Share Posted October 16, 2014 2 days? didnt give her much of a chance...... hope you sold her to somebody that will invest more time into getting her healthy..... Link to comment Share on other sites More sharing options...
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