![]() She also told me she used the fuel treatment/ fuel injector cleaners by lucas and stp every 2000 miles. Well unfortunately I was able to get a hold of the previous owner and according to her, She will top off the oil, every 500-700 miles, also all her oil changes and oil preference was synthetic only. I was told by a senior member who seems to know his stuff that if I am only having to refill the oil every 1500 miles or so I am good but if I have to refill 1qt every 600 miles that's NOT good. I also thought it was a misfire but I won't know that until I guess after the exhaust manifold is replaced. ![]() I didn't go to autozone or to a mechanic to get the check engine light read yet, and I plan to do that soon. When you accelerate the car sounds very loud and when you are pressing the brakes or idling in park mode you feel the entire car shake and the entire exhaust shakes too. I know that the exhaust manifold cracking was a common issue with the 2G protege (1995-1998) especially the 1.5L engine. The flex pipe looks somewhat rusty but I can't see if there is a hole in that. They seller originally told me that they replaced the entire exhaust from the catalytic converter to the muffler. ![]() Ok from what I know the engine looks dirty and grimy I originally thought it is leaking from the valve cover gasket and being burned off, the crack is pretty much right before you get from the manifold to the flexpipe toward the bottom, I only said burning oil because when you start the car you can smell the burnt oil along with exhaust fumes from the crack in the manifold. You may have leaking valves, or cylinder blow by problems that are causing the oil burning problem.and THAT may be whats causing the sustained misfire, of which eventually burned up your exhaust system.a crack by itself shouldn't blink the ecu constantly, and shouldn't do anything to oil 'll just drive like shat until you get it fixed, and may throw a solid code from time to time.but flashing.you have a lot going on it seems. The bigger problem though.is possibly what caused it.I'm not sure on 98 models.but 99+ model ecu's only flash the ecu for sustained mis fire conditions.so its a p0300-304 code, meaning its misfiring non-stop.a mis fire will cause unburned gasoline to get inside of a hot exhaust pipe.in which it'll ignite there.and quickly burn up the manifold and/or catalysts.įirst.fix the crack.replace the part, have it welded, whatever.while doing this, see if the catalysts check out.chances are they are now dead too at least if you continued trying to drive with a constant misfire condition.if after the system is in check.you still get misfire problems.stop driving, you're just going to recreate the problem again.and i'd look into coils, plugs, wires, etc.to see what exactly is causing the misfire. If your problem is ONLY a cracked exhaust shouldn't have any effect on burning oil.Ī crack in the exhaust, depending on its location, can cause some funny stuff though.the system relies on pulse vacuum to help pull burned gas out of the chambers.a leak will ruin that vacuum, causing something known as exhaust reversion.in which pressure builds up in the wrong direction around the crack.the cylinders will 'push' the burned gas out, but the pressure gradient will stall it and try to push the exhaust gas back in.causing poor driveability, ridiculous idle, and hesitation in various rpm ranges.ĭepending on where the crack is.it can also interfere with the primary o2 sensor readings.making the engine mismatch fuel requirements in light load conditions and idle.making the problem even worse. ![]()
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