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Mic wrote:Hey guys, thanks for taking the time to help me. So the story starts about 3 weeks ago:
I have a CS2 lancer singapore foreign used import. Car is at about 208,000 KM. About 3 weeks ago the car started hestiating and misfiring one day when the gas tank was about less than 1/5 , took it to the mechanic, said it was coil pack. Changed both coil packs and spark plugs and serviced throttle body with spray. Car started running a little better.. But when you accelerate from stop its sluggish and hestitating/misfiring. When it picks up speed it works good but then starts to surge and buck randomly. So did some research and online said it could be the fuel pump.
So today I changed the fuel pump, took off negative pole from battery, replaced the fuel pump with an aftermarket one, and put it back in. Put on the negative pole. Tried to start the car, it started, idled for like 10 seconds (RPM when to 1000) then it started dropping and cut off. The entire time you can hear the fuel pump running. When the car idles for those 10 secs, if u mash the gas pedal, the car cuts off.
Checking the front of the car, you getting gas to the intake line to the fuel rail, injectors pulsing, and you getting spark. But the car cuts off after 10 seconds of idling. Another thing I noticed, when you turn the key to the on position, the fuel pump doesnt prime and send out fuel. Only time it sends out fuel is when the engine is cranking or car is idling for those 10 seconds.
Any advice is much appreciated. Tried another Camshaft sensor but same problem. Mechanic tried diagnostic tool and no errors showing up. Or if anyone is a mechanic and could come home by me and take the job to fix this without killing me with price, inbox me
Thanks Fellas..
Mic wrote:skylinechild wrote:Mic wrote:Hey guys, thanks for taking the time to help me. So the story starts about 3 weeks ago:
I have a CS2 lancer singapore foreign used import. Car is at about 208,000 KM. About 3 weeks ago the car started hestiating and misfiring one day when the gas tank was about less than 1/5 , took it to the mechanic, said it was coil pack. Changed both coil packs and spark plugs and serviced throttle body with spray. Car started running a little better.. But when you accelerate from stop its sluggish and hestitating/misfiring. When it picks up speed it works good but then starts to surge and buck randomly. So did some research and online said it could be the fuel pump.
So today I changed the fuel pump, took off negative pole from battery, replaced the fuel pump with an aftermarket one, and put it back in. Put on the negative pole. Tried to start the car, it started, idled for like 10 seconds (RPM when to 1000) then it started dropping and cut off. The entire time you can hear the fuel pump running. When the car idles for those 10 secs, if u mash the gas pedal, the car cuts off.
Checking the front of the car, you getting gas to the intake line to the fuel rail, injectors pulsing, and you getting spark. But the car cuts off after 10 seconds of idling. Another thing I noticed, when you turn the key to the on position, the fuel pump doesnt prime and send out fuel. Only time it sends out fuel is when the engine is cranking or car is idling for those 10 seconds.
Any advice is much appreciated. Tried another Camshaft sensor but same problem. Mechanic tried diagnostic tool and no errors showing up. Or if anyone is a mechanic and could come home by me and take the job to fix this without killing me with price, inbox me
Thanks Fellas..
what after market pump did you use ?? was the pump installed correctly - wired up correctly ??
did you install an after market pressure regulator to ensure the system receives the correct psi pressure of fuel ??
Pump works correctly, was a japan brand. But even when I put back the old pump on (Drove the car to go buy the new pump) it doesn't work. Even tried a subaru legacy original pump and same thing.
I think the problem has to do with a relay? Because when I turn the ignition on the pump doesnt turn on to prime, only when im cranking the pump turns on, the car idle for 10 seconds and the pump will supply gas to the fuel rail then the car will drop RPM from 1000 and stall out (happens instant if I mash the gas pedal). There will be no fuel in the return line back to the pump.
From what I reading there are 2 relays that control the fuel pump?
Could it be that something mess up when I take off the negative terminal to install the new pump?
Mic wrote:
This is the pump I bought from Chuna's:
https://www.alibaba.com/product-detail/ ... 81512.html
I used the subaru pump (non turbo) to test if the new pump i had bought was defective but it was not. So i know the pump is good. Also I the fuse is good but I will check the relay in the morning. I believe the mechanic had checked it and said it was also good. He had also clamp the return line from the Fuel pressure regulator and it had the same problem of stalling. So does that mean that the one I have now gone thru?
Doing some research online says that some signs of a bad FPR is stalling when mashing the gas pedal so you could be right.
Mic wrote: Or besides that it could also mean the the FPR I have right now completely gone thru. Since when I open the pump assembly the old pump I took out looked aftermarket aswell which means that the people I buy the car from before also had changed the pump and used back the same FPR.
Now the FPR gone thru so it not holding any pressure at all. If I can remember correctly I think I did see some fluid leaking from the exhaust pipe the day before when I cleaned the throttle body and when I first start the car after installing the pump a cloud of black smoke from the muffler. So ill start first by changing the FPR
Mic wrote: I saw either fuel or throttle body spray leaking from the exhaust the day before all of this happen when i cleaned the throttle body. So I doubt the cylinder flooded because it was leaking before the fuel pump was changed and when car was working. So they leads me to think that its the FPR.
Someone also said the same thing and said it could maybe be a leaky injector or is that not possible since all injectors are pulsing. I think the option I have is to try and get the FPR foreign used or buy the whole rail with injectors and FPR.
Mic wrote:
Thanks for being patient with me.. From the research I find, it says the Stock fuel pressure is about 3 Bars = 38-43PSI which sounds about right a for a 1.5L engine. You have any idea how much for a cheap aftermarket FPR so I would know if I getting robbed or just to buy it online... Thanks again
EDIT: https://turkish.alibaba.com/product-det ... 87549.html
That is the aftermarket pump I bought and the specs say it is 3BAR PSI which means that the Stock FPR should work not so? Will see whichever one is easiest to get if thats the case.
Mic wrote:
Yeah only reason I would go with the Foreign used is cuz I seeing men calling 1050$ for a Aeromotive FPR lol so I assuming the price will be ridiculous.. When I hear a fuel rail with injectors and FPR is $600 in the bamboo lol.. Which check around tmrw tho and see if anywhere have universal ones for decent price. Will post back with results.
Mic wrote:SOLVED - Problem turned out to be a low fuel pressure caused by a crack/leak in the Fuel pump housing.. Changed the housing and problem fixed. Slight missfire still existed which was caused by a small crack in the spark plug wire/ missing rubber from the coil pack boots which goes over the spark plug.
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