ok so im having problems starting my car 91 325ic, i swapped out injectors 19lb ones replaced the fuel pump thinking it was that but still nothing, if i shot starting fluid in intake manny i get it to fire up & im able to run it but once i shut her down i cant fire her up. i have checked the fuel at the rail im getting fuel, im not sure if a fuse is blown or if its a relay, i seem to be getting the pump to run in start mode, but when it drops into run mode it cuts off, help.. there was white smoke coming up from the bottom but turns out my cats (meow) fucked. speed bumps & lowered cars dont mix lol
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jag -
Have you done the stomp test to see if you are pulling any codes? When was the last time you changed your fuel filter? Just becasue you are getting fuel to the rail does not mean it is at the right pressure or consistant pressure. Does the fuel pump run if you jumper the relay to override it? If not, then it is your main relay that is screwed up not the fuel pump relay. Replacing both is not expensive and a good thing to do just for preventative maintenance.The difference between porcupines and BMWs is that porcupines have the pricks on the outside! -
Ok I replaced the main relay & fuel pump relay w my other cars & it hesistates to fire up. I get it to run boggs down & idles a lil high.. I let it idle for a min & it hovers at 1k, drove around like that for couple min shut her down & can't get it to fire up anymore.jagComment
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Did it run fine before you changed the injectors? This could be a temp sensor gone bad and the ECU thinks that the motor is cold all the time so is flooding the cylinders with too much fuel. Do you have a bentley? You need to start eliminating things by making sure they test good! It also could be bad AFM, CPS and a few other things too. Gotta narrow it down!The difference between porcupines and BMWs is that porcupines have the pricks on the outside!Comment
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Nope wasn't working right before the injector swap. I should also add that car overheated on me but it turnf out to be a combo of bad house, bad t-stat & belt.. yea she's been a pain this last couple weeks seems like she's going down hill way to fast.. I just got the bookjagComment
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do you have spark? if no.. check crankshaft position sensor. Also double check your relays and fuel filter.Comment
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The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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No I didn't throw in the 19lb injectors to fix the issue I had a clean set layin around figured might aswell swap em in not like its gunna hurt it more than what it already is. Gunna wait for a budd to come over so I can check for sparkjagComment
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I didn't say that the injectors were an attempt to fix the problem. My point was that unless the engine was already running perfectly, mega-oversized injectors are just going to make the problems worse.
The fuel pump dropping out tends to point to:
No power to the DME (bad main relay, bad fusible link, or a wiring fault)
Bad CPS
Bad DME
Now lets hope that the overheat didn't kill the head or head gasket.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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So I checked for spark & I'm not getting anyjagComment
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how did you check for spark?
my favorite method is pull a sparkplug, hold it, and have a friend crank the engine.AWD > RWDComment
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No spark could mean:
No power to the coil or a fault in the wiring between the DME & coil
No timing data to the DME
No power to the DME,
Bad DME
A bad coil is a possibility, but the other items have a higher probability.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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Update.. damn reference sensorjagComment
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meow
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