BlueLGT408 Posted March 15, 2019 Share Posted March 15, 2019 I'm thinking i've got a something fuel related going bad on me. Have an intermittent loss of power while cruising (haven't noticed a speed or rpm pattern). Hasn't done it under load. Car seems to lose all power for a brief second then returns to normal operation. Anyone else have a similar issue or ideas as to what might be causing this? Link to comment Share on other sites More sharing options...
Cobber15 Posted March 16, 2019 Share Posted March 16, 2019 Are you hitting the gas and RPMs go up, but car seems to not respond at the wheels, almost like you’re in neutral? Link to comment Share on other sites More sharing options...
BlueLGT408 Posted March 16, 2019 Author Share Posted March 16, 2019 No, steady throttle position and for no apparent reason the car stumbles. RPM and power drops off momentarily, before returning as if nothing happened. Has happened cruising at 30, 40, 45, and 55 mph. Link to comment Share on other sites More sharing options...
Cobber15 Posted March 17, 2019 Share Posted March 17, 2019 Is this an ongoing thing, or something recent? Link to comment Share on other sites More sharing options...
BlueLGT408 Posted March 17, 2019 Author Share Posted March 17, 2019 recent development, started beginning of this week, but i have another vehicle so i parked the legacy as i have a descent commute and didn't want to get stranded. Link to comment Share on other sites More sharing options...
Notorious Posted March 17, 2019 Share Posted March 17, 2019 Similar thing happened to me but I got a CEL for the throttle position sensor. Cleaned, relubed, and all was fine. Link to comment Share on other sites More sharing options...
BlueLGT408 Posted March 18, 2019 Author Share Posted March 18, 2019 Didn't have time to get into it this weekend, but at a glance it looks like i'll have to pull the manifold to get to the TPS. Was that the case when you cleaned yours? Link to comment Share on other sites More sharing options...
ripstik Posted March 18, 2019 Share Posted March 18, 2019 No, steady throttle position and for no apparent reason the car stumbles. RPM and power drops off momentarily, before returning as if nothing happened. Has happened cruising at 30, 40, 45, and 55 mph. I had this happening to me right before a coil pack went out. possibly not the issue but can be easily checked if you have an AP... just log cyl roughness (misfires) for each cylinder and if you see anything over 2 you've likely found your issue. swapping coils with another cylinder to see if it follows will make it definite. Link to comment Share on other sites More sharing options...
rgeo13 Posted March 19, 2019 Share Posted March 19, 2019 Mine is doing something sort of similar to this. First noticed it Jan of 2018 when driving in 6th gear, cruise control set at 70something. Sudden kick, that's it. Extremely brief loss of power, so quick RPMs don't drop, MPG gauge doesn't change. It was so quick and so weird I just let it go. Later on in that trip (6 hour highway trip), same thing happened. Also in cruise. Thought it may be cruise control related so I stopped using it. Since then, I have replaced spark plugs, cleaned fuel injectors, cleaned throttle body, changed fluids, all kinds of preventative maintenance. Sort of forgot about it until this winter, and it seems to do it more frequently. Usually only when snowing (fine in rain), but I still haven't been able to notice a pattern. Car is usually warmed up, no pattern with certain RPMs, certain gears, certain temps, certain throttling. Kinda weird but I'm just waiting to see what happens moving forward because I know if I take it in to the shop, there's no way they'll be able to get the car to do that and they'll think I'm crazy. Does this sound similar? A sudden "jolt", or kick? The only thing I have noticed is it's always when in gear and under some sort of acceleration, never coasting in gear. Link to comment Share on other sites More sharing options...
dgoodhue Posted March 19, 2019 Share Posted March 19, 2019 Mine is doing something sort of similar to this. First noticed it Jan of 2018 when driving in 6th gear, cruise control set at 70something. Sudden kick, that's it. Extremely brief loss of power, so quick RPMs don't drop, MPG gauge doesn't change. It was so quick and so weird I just let it go. Later on in that trip (6 hour highway trip), same thing happened. Also in cruise. Thought it may be cruise control related so I stopped using it. Since then, I have replaced spark plugs, cleaned fuel injectors, cleaned throttle body, changed fluids, all kinds of preventative maintenance. Sort of forgot about it until this winter, and it seems to do it more frequently. Usually only when snowing (fine in rain), but I still haven't been able to notice a pattern. Car is usually warmed up, no pattern with certain RPMs, certain gears, certain temps, certain throttling. Kinda weird but I'm just waiting to see what happens moving forward because I know if I take it in to the shop, there's no way they'll be able to get the car to do that and they'll think I'm crazy. Does this sound similar? A sudden "jolt", or kick? The only thing I have noticed is it's always when in gear and under some sort of acceleration, never coasting in gear. It could be a coil. You probably don't have the ability to log the cylinder roughness or misfires for your 2.5i to confirm the issue. It will eventually get worse and set code. Link to comment Share on other sites More sharing options...
rgeo13 Posted March 19, 2019 Share Posted March 19, 2019 It could be a coil. You probably don't have the ability to log the cylinder roughness or misfires for your 2.5i to confirm the issue. It will eventually get worse and set code. Interesting. I do not have that ability. I appreciate the insight! Link to comment Share on other sites More sharing options...
ripstik Posted March 20, 2019 Share Posted March 20, 2019 Interesting. I do not have that ability. I appreciate the insight! get yourself a $15 bluetooth OBDII reader and the torque app, should be able to at least read the misfires even if you can't log them. but what your describing is the exact way i described my issue when my coil pack was dieing. a visual inspection can be done also, they tend to get rusty and the plates spread away from each other when they are going bad at least in my experience. Link to comment Share on other sites More sharing options...
BlueLGT408 Posted March 22, 2019 Author Share Posted March 22, 2019 Threw a can of BG44k fuel system cleaner in it, and she seems to be happy so far. Might just have to move up my fuel system upgrade to when I do timing belt. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.