Possible problems with fuel.
I didn't clear it out. I went on ebay and found a stock injector that had been cleaned and flow tested for like $8. I only replaced that one and the car ran better. It was the injector on the drivers side furtherst to the back. The fuel comes in on the back of the fuel rail here and since all the fuel passes by this injector first it seems to pick up most of trash before it gets to the other injectors. Check it out. It took me a while to fiqure it out myself. Good Luck
How do you test the injectors to see which one is bad?
Could this also cause the car to not start? Like i stated before mine will only start half the times. It will turn over but no ignition.
Could this also cause the car to not start? Like i stated before mine will only start half the times. It will turn over but no ignition.
can you hear your fuel pump turn on when you have the ignition to 'on'? thats weird, maybe you do have a different problem than me lol
To figure out what injector it was I read my trouble code with a scan tool. When I knew what cylinder was missing I first checked the wire, plug and coil pack on that cylinder. When all of those were fine the injector was the only thing left it could be. You could pull the injectors and see if the screen on the top is clogged. I would get it scanned you could have a pending misfire code that would still show up when scanned even if your light isn't on.
You can also buy a fuel pressure guage pretty cheap that will attach to the front of your fuel rail, and at least it will let you see if you have the right fuel pressure when it won't start. If it's too low or flucuating then you have a pump of regulator problem. I've seen the guages for $25.
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To figure out what injector it was I read my trouble code with a scan tool. When I knew what cylinder was missing I first checked the wire, plug and coil pack on that cylinder. When all of those were fine the injector was the only thing left it could be. You could pull the injectors and see if the screen on the top is clogged. I would get it scanned you could have a pending misfire code that would still show up when scanned even if your light isn't on.
Yeah I would go ahead and get it scanned even if you don't have a code thrown. Maybe your light is blown or there is another problem, because it sounds like it should have thrown a code by now. Obviously there is something wrong. Like I was saying you should pull a couple injectors and see if the screens on the top of them is dirty or clogged. If you have many miles on your car some trash is gonna make it threw the fuel system. Good Luck
hey txjeep i do hear the pump turn on. I'm starting to think its the injectors. Ima get the fuel pressure and the injectors looked at this weekend.
i go this from another website. Do yall think this could be the problem to my car not starting properly?
Another Scenario
At the last International Automotive Technicians Network (iATN) convention in Dearborn, MI, a roomful of top technicians from all over the country was challenged to correctly diagnose several real-world driveability problems. They were given a description of some vehicles and their symptoms, then allowed to view actual test data that was taken from the vehicles using a variety of different diagnostic tests and equipment.
The challenge was to figure out which diagnostic tests and equipment would provide the most useful information, and to then analyze this information to come up with a diagnosis. It proved to be a difficult task because opinions differed as to what data should be looked at first, and what the data actually meant. Some people resorted to making wild guesses in an attempt to solve the problems.
fuel pump
One example that stumped a lot of technicians was a car that would start and run fine when cold, but had a hot-start problem. It would crank but not start. It had fuel, spark and compression. Fuel pressure and vacuum readings were normal. Coil resistance, spark plugs and wires were all within specifications.
The hot-start problem turned out to be a bad coolant sensor. The sensor was preventing the fuel system from going into closed loop, which created a rich mixture that flooded the engine when a hot start was attempted.
i go this from another website. Do yall think this could be the problem to my car not starting properly?
Another Scenario
At the last International Automotive Technicians Network (iATN) convention in Dearborn, MI, a roomful of top technicians from all over the country was challenged to correctly diagnose several real-world driveability problems. They were given a description of some vehicles and their symptoms, then allowed to view actual test data that was taken from the vehicles using a variety of different diagnostic tests and equipment.
The challenge was to figure out which diagnostic tests and equipment would provide the most useful information, and to then analyze this information to come up with a diagnosis. It proved to be a difficult task because opinions differed as to what data should be looked at first, and what the data actually meant. Some people resorted to making wild guesses in an attempt to solve the problems.
fuel pump
One example that stumped a lot of technicians was a car that would start and run fine when cold, but had a hot-start problem. It would crank but not start. It had fuel, spark and compression. Fuel pressure and vacuum readings were normal. Coil resistance, spark plugs and wires were all within specifications.
The hot-start problem turned out to be a bad coolant sensor. The sensor was preventing the fuel system from going into closed loop, which created a rich mixture that flooded the engine when a hot start was attempted.
Last edited by osvaldo; Feb 24, 2009 at 04:52 PM.
hey txjeep i do hear the pump turn on. I'm starting to think its the injectors. Ima get the fuel pressure and the injectors looked at this weekend.
i go this from another website. Do yall think this could be the problem to my car not starting properly?
The hot-start problem turned out to be a bad coolant sensor. The sensor was preventing the fuel system from going into closed loop, which created a rich mixture that flooded the engine when a hot start was attempted.[/I]
i go this from another website. Do yall think this could be the problem to my car not starting properly?
The hot-start problem turned out to be a bad coolant sensor. The sensor was preventing the fuel system from going into closed loop, which created a rich mixture that flooded the engine when a hot start was attempted.[/I]
lol I hope it wont be something like that.. if that was a possiblity then ANYTHING could be wrong lol reading that scared me a little. I've also read that ignition coils when hot will not start up
I'm starting to thing that my coils are going out(still stock ones), im swapping them out with a friends ls1 this weekend to see if it fixes the problem
Joined: Dec 2004
Posts: 1,294
Likes: 0
From: Dallas (Richardson), TX, USA
I've had the issue with the car not starting and having to turn the ignition twice. I had that problem for a long time without any other apparent issues. When I went with the Procharger, I installed the fuel pressure gauge before making any other fuel changes, and I noticed that the fuel pressure was very inconsistant when the pump primed. After upgrading to the dual Walbros, the fuel pressure is 45psi on the dot after priming every time, and the issue is resolved.
is this what your engine is doing while driving?
http://www.youtube.com/watch?v=6IFd_sumIZ0
that's mine
I would hold off on the fuel pump right now- today I am swapping on someone elses LS1 coils to see if that solves the problem, I'll let you know what happens.
I thought it was my fuel pump, turns out it wasn't! now I'm out $120, don't make my mistake lol
did you check your ground behind the passenger side head? make sure they are really tight.
also, when it doesn't want to start up do what Gauge said and turn your ignition to 'on' wait a second then turn it back to off then turn it back to 'on' to "prime" it really good(if it does start up after doing that then ya, your fuel pump isnt giving enough pressure)
my engine only has 15,000miles on it! But the coils/wires are original (which would have about 80k miles now I am guessing, which makes me somewhat sure it could be the coils/wires)
http://www.youtube.com/watch?v=6IFd_sumIZ0
that's mine
I would hold off on the fuel pump right now- today I am swapping on someone elses LS1 coils to see if that solves the problem, I'll let you know what happens.
I thought it was my fuel pump, turns out it wasn't! now I'm out $120, don't make my mistake lol
did you check your ground behind the passenger side head? make sure they are really tight.
also, when it doesn't want to start up do what Gauge said and turn your ignition to 'on' wait a second then turn it back to off then turn it back to 'on' to "prime" it really good(if it does start up after doing that then ya, your fuel pump isnt giving enough pressure)
my engine only has 15,000miles on it! But the coils/wires are original (which would have about 80k miles now I am guessing, which makes me somewhat sure it could be the coils/wires)
Yeah thats exactly what my car is doing. I neutral it revs up fine, not stuttering nothing. In gear its a different story. I'm gonna start by changing the coolant sensor, get my pump checked out, if its bad replace it, if not replace the injectors. You think ima need to get my coils checked out?
I just paid this SOB off and its giving me all these problems. Ima sell it!!!
I've seafoamed the car once before, didnt really help. I recently used some lucas injectors cleaner but that obviously did nothing.
I just paid this SOB off and its giving me all these problems. Ima sell it!!!
I've seafoamed the car once before, didnt really help. I recently used some lucas injectors cleaner but that obviously did nothing.
12 Second Club
Joined: Jun 2008
Posts: 2,585
Likes: 3
From: Edmond, OK
Yeah thats exactly what my car is doing. I neutral it revs up fine, not stuttering nothing. In gear its a different story. I'm gonna start by changing the coolant sensor, get my pump checked out, if its bad replace it, if not replace the injectors. You think ima need to get my coils checked out?
I just paid this SOB off and its giving me all these problems. Ima sell it!!!
I've seafoamed the car once before, didnt really help. I recently used some lucas injectors cleaner but that obviously did nothing.
I just paid this SOB off and its giving me all these problems. Ima sell it!!!
I've seafoamed the car once before, didnt really help. I recently used some lucas injectors cleaner but that obviously did nothing.
Anyone throw a gauge on there yet to see if you have the correct fuel pressure? It should read right around 58psi. Of you having the problem, who has an egr?
Possible causes:
-clogged or bad injectors
-clogged fuel filter
-bad fuel pressure regulator
-bad pump
-bad egr
-plugs/wires/coils
Possible causes:
-clogged or bad injectors
-clogged fuel filter
-bad fuel pressure regulator
-bad pump
-bad egr
-plugs/wires/coils