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| Keeps dying | |
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| Tweet Topic Started: Aug 5 2015, 07:41 PM (1,452 Views) | |
| Car Nut | Aug 5 2015, 07:41 PM Post #1 |
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99 3cyl hatch, 5 speed. Runs great all around town, all day, all week whatever. Jump on hwy or interstate doing 50 or more & after 5-10 min it feels like it's starving for fuel. Just like someone turned off the key. Engage clutch & coast, downshift to 3rd or 4th, pop the clutch & it goes on down the road for a couple minutes, until it does it again. Gets worst tne longer I drive. Seen this with other cars & it turned out to be the fuel pump. Installed a brand new pump & sock filter, same problem. No check engine light, so I guessing it's not ignition or emissions related. Still leaning towards fuel issue. Is the gas cap supposed to be vented? Maybe its clogged? Driving me crazy. Ideas??? Dont have a 99 FSM. Might try the 96 I have. Hoping maybe somebody's seen this already. |
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| Car Nut | Aug 5 2015, 10:18 PM Post #2 |
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Bump |
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| aaronvincent | Aug 5 2015, 10:21 PM Post #3 |
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Mr Mojo Risin'
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Fuel filter? You may have a clog that intermittently closes up after heavy acceleration, happened to my 91 XFi. |
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| Good bye | Aug 5 2015, 10:25 PM Post #4 |
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How does it run with the gas cap off? Sounds like the evap system pulling a vacuum on the tank at highway speeds. The canister purge valve may be stuck open and giving full manifold vacuum to the tank all the time. |
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| Car Nut | Aug 6 2015, 03:38 AM Post #5 |
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No filter on these later model systems, other than the "sock" attached to the fuel pump in the tank. Acts just like a stopped up filter tho. |
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| Car Nut | Aug 6 2015, 03:47 AM Post #6 |
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Interesting. Wouldn't it be tiggering a check engine light & throwing a code, since that's an emissions related issue? Haven't run it with the cap loose yet. Just thought of it last night while I was posting. Purge valve under the hood, on top of the canister. I'm guessing? |
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| freegeo | Aug 6 2015, 09:00 AM Post #7 |
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Check the rubber and metal fuel lines back at the tank for kinks. Have you checked the fuel pressure? What do your plugs look like?
Edited by freegeo, Aug 6 2015, 09:03 AM.
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| freegeo | Aug 6 2015, 09:13 AM Post #8 |
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There are 5 different codes for the EVAP system, Looks like it would trip one of them if it wasn't working right. Gas related problems have no codes unless it would causes a miss fire. |
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| Car Nut | Aug 6 2015, 12:10 PM Post #9 |
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That's exactly what I'm saying. Gut feeling it is fuel related. |
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| myredvert | Aug 6 2015, 04:18 PM Post #10 |
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myredvert
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There are always the occasional problems don't fit neatly into the programmed DTC tests. It does sound like something related to pressure or contamination, but the fact that it will temporarily go away if you shut it off might make it hard for you or the OBD system to catch it while it's happening and measure or put a "name" on it. Especially if it is a transient pressure/vacuum condition. Since you already took care of the filter possibility, what about opening up your feed line at the injector and flushing it out with the pump, and if necessary cleaning the injector/regulator? That might help eliminate the possibility it is from contamination already in the lines past the filter that builds up at the throttle body, than recede back when the engine is off. ![]() And along the lines of "only change one variable at a time," I would also consider trying a different fuel cap, but not at the same time as anything else you try. I wouldn't think the cap would be doing this, since the system vents itself between the tank and the emissions canister and the cap is supposed to only be a "ultimate" relief for severe over or under pressure conditions. ![]() |
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| Old Man | Aug 6 2015, 04:38 PM Post #11 |
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catalytic converter |
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| Car Nut | Aug 6 2015, 05:52 PM Post #12 |
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New convertor approximately 1500 miles ago. Car not smoking, missing, runs great, until it doesn't. Usual suspects that kill cats aren't present. I try real hard not to be a cat killer. |
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| freegeo | Aug 6 2015, 06:29 PM Post #13 |
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I have a 98 fsm. let me look after work. |
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| evmetro | Aug 6 2015, 06:34 PM Post #14 |
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A failing injector has left me stalled out for hours at a time before it would restart. It would die in traffic, and I would have to get it off the road and wait for hours. That particular Metro was an automatic, so I could not downshift with the stall like you are able to do. If you have an extra tbi top, I would swap it out. That's all I did with mine, and it never stalled out again, at least until I totaled it...
Edited by evmetro, Aug 6 2015, 06:37 PM.
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| Car Nut | Aug 6 2015, 06:59 PM Post #15 |
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I can probably swap the one off my 2000 & see what happens. Thanks for the tip. |
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3:49 AM Jul 11