2010 GL450 fuel delivery problem
#1
2010 GL450 fuel delivery problem
Check engine light came one day but truck was driving just fine. Ran a couple of errands and truck ran just fine. Drove home after work and parked over night. Next morning it cranked but would not start. After diagnostic, which only brought up the actuator and random misfire codes, I made the following repairs:
- Tumble flap actuator
- Crank shaft position sensor
- Camshaft position sensors
- MAF
- MAP
- New Plugs
- New Fuel pump
- Fuel pump relay
- Compression is good
- Spark is good
- Fuel pressure is good at rail
- All fuses are good
- Disconnected after market auto start
- Battery is good (and auxillary)
I think that's it. I sprayed starer fluid and it starts and runs until it burns off. As you might imagine I am totally miffed. I am not a mechanic but I am very handy with the help of YouTube and this forum. Any suggestions will be greatly appreciated. Otherwise I am at the mercy of the dealer.
- Tumble flap actuator
- Crank shaft position sensor
- Camshaft position sensors
- MAF
- MAP
- New Plugs
- New Fuel pump
- Fuel pump relay
- Compression is good
- Spark is good
- Fuel pressure is good at rail
- All fuses are good
- Disconnected after market auto start
- Battery is good (and auxillary)
I think that's it. I sprayed starer fluid and it starts and runs until it burns off. As you might imagine I am totally miffed. I am not a mechanic but I am very handy with the help of YouTube and this forum. Any suggestions will be greatly appreciated. Otherwise I am at the mercy of the dealer.
#4
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2007 GL450
Swap a coil between #3 and its neighbor. The 0300 can surface just because the motor goes into lean burn and gets erratic power. The misfire sensor is crude; it just looks for consistent power output.
In all likelihood you have a bad coil on #3. Since it's a bit of work to change the coil, and since you seem happy throwing parts at the problem, I'd just change the coil.
Delphi is the manufacturer for the Bosch coils, so there are a ton of purchase options.
You probably already know this, but #3 is the third one from the front, passenger side.
In all likelihood you have a bad coil on #3. Since it's a bit of work to change the coil, and since you seem happy throwing parts at the problem, I'd just change the coil.
Delphi is the manufacturer for the Bosch coils, so there are a ton of purchase options.
You probably already know this, but #3 is the third one from the front, passenger side.
#5
Thanks for the reply. I do agree about that code being crude. I did think about changing coils, however, spark is fine throughout and one bad coil should not stop it from starting. Nor should a bad injector. I am of the opinion that it has to be something electronic.
Thanks again.
Thanks again.
#6
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2007 GL450
You say it has spark? That's a lot of work to check all eight coils. If so I'm impressed. If not, check the spark on #3; take out the plug and put it in the coil, resting it so the body of the plug is against ground, or hook a jumper from body to ground. Then crank the motor.
A motor has to have fuel, air, and spark, at the right timing, for it to run. Assuming the mechanical innards have not self destructed, i.e. camshaft is gone, you can check for spark as above, check for fuel (pressure on the rail, injector clicking (use a stethoscope)). If those are good, the only other possibility is the timing is gone. This is hard to imagine unless you made a mistake on the crankshaft or camshaft position sensors.
A complete no start is often something major wrong (computer dead) or major stupid (computer unplugged). I'm a veteran of both; no shame. Do your fundamental checks as above, clear the codes completely, then evaluate. If the computer is dead, it would be the front SAM.
Did you clear the codes? (Write them down first.) The computer is careful to protect the catalytic converter, so it will automatically go into lean burn mode even if it only has an old misfire code. After some time it will automatically reset, but you can do it manually.
What was the "actuator" error? Hint for the future, always give full diagnostic information. What exactly was the error, and what did you replace?
Fuel pump? Isn't that a huge repair? What is the MAP?
Get a trickle charger on the battery or you may find yourself with yet another demon to exorcise.
#7
Super Member
My GL is 2007 MY. I went thru all this and at the end Dealer determined it was the ECU/DME not giving gas signal to fuel the engine. $2500 later it is all fixed. I thought the 2007 have more issues with DME and 2010 they should have been all updated.