On My 1999 beetle. Car runs fine when I start it, BUT only when I get more gas its hard to start. I have to pump pedal to get it to start. After this it starts and runs fine. ONLY when I get more gas it acts up.. Is it a fuel tank pressure sensor that has gone bad?
Can you help with an isue on a 2004 Megane 11. The car runs well until the vehicle gets heated then the car shuts down and the check injection message and check gearbox message comes on. The vehicle will only restart if the fuel pressure sensor is disconnected or the vehicle is cool.
@TheViperCars make sure you have a suitable amount off both oil and coolant in your vehicle. if that is not the problem then try take it to a mechanic who can actually see the vehicle as it is very hard to work out the cause of the problem without doing basic checks on the vehicle which unfortunately cannot be done online
problem now fixed.i had shorted wires at the ecu.car now running again.fuel rail was ok afterall.thanks again for your help mandy.can you suggest a decent scantool as im now interested in fault finding.regards steve
Hello Steve, in regards to your question this is our business. We design and manufacture scanner, scopes, DVDs, books, etc. Check out our ADPScan-1 or Scan-1 Diagnostics System. Our products are for the professional side of things. They're not just code readers.
In today's auto diagnostic world, what you need is massive loads of HELP. Most tools do not give you help. And help geared to your particular problem.
Do a search for our free download for the ADPScan-1 or Scan-1. It also has lots of training on its Demo-Mode section. You can ever alter engine parameters and see how they impact operation, while seeing the interactive wiring diagram.
Regarding the shorted wires that you found and corrected: Was the short caused by chaffing? My ECU wire bundles come from the factory simply wrapped in rubber tape. At 30k miles I took a good look at these bundles and found that the engine heat had accumulated at the front fender at top of strut exactly where the wrapped wires touched. There was three out of the four layers of rubber tape simply missing. I ended up wrapping the bundles in heat shield wrap and went to work on all radiating heat.
@trainlinezoo Good thinking, although that should have been done at the factory. Sometimes repairs like that are necessary, however. There might have been a recall for that particular issue. Good luck.
great video.can you help with a problem with above system on my focus st170.fault code is p0193 which is fuel rail pressure sensor signal high.how do i check this sensor is good before i spend £155 on a new one.regards steve from scotland.
Hello, I'll need a bit more info on your vehicle. But, I'll respond to the testing procedure question.
The key in understanding a fuel-rail press. sensor is this. It takes less fuel pressure for FUEL DELIVERY with a high vacuum engine, than with no vacuum. Remember that engine at idle (high vacuum) is sucking right at the injector. So less fuel pressure is needed. Then ECM will command less fuel pressure, fuel pump runs slower and end result: lower fuel pressure.
And verify changing voltage. If possible verify with scan tool. These steps will test the wiring.
Now then check your sensor output:
Reconnect sensor, and probe with DMM at the signal wire. Start engine, make sure you have fuel pressure to specifications (search data or Google), you should have between 1.5 to 3.5 volts, depending on LOAD and acceleration.
You may also remove FRP sensor (disable fuel pump first) and test with compressed air. If sensor tests OK, problem may be at Fuel-Pump or circuit. Good luck.
Yes it is. FORD does all its fuel pressure control electronically, rather than using an in-tank fuel press. regulator (GM, Dodge, etc). So that the ECM varies the duty-cycle to the Fuel Pump, depending on fuel pressure. Thank you for the comment. Mandy...
There are many GMs with variable fuel pressure. Fuel Rail pressure sensors are more prevalent in Fords. Most early variable fuel pressure systems were of two speed types. A simple module controlled fuel pump current. Good luck to all.
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On My 1999 beetle. Car runs fine when I start it, BUT only when I get more gas its hard to start. I have to pump pedal to get it to start. After this it starts and runs fine. ONLY when I get more gas it acts up.. Is it a fuel tank pressure sensor that has gone bad?
markj15062 1 month ago
fuck this carburetor is still king
Nigelk388 1 month ago
Can you help with an isue on a 2004 Megane 11. The car runs well until the vehicle gets heated then the car shuts down and the check injection message and check gearbox message comes on. The vehicle will only restart if the fuel pressure sensor is disconnected or the vehicle is cool.
TheViperCars 2 months ago
@TheViperCars make sure you have a suitable amount off both oil and coolant in your vehicle. if that is not the problem then try take it to a mechanic who can actually see the vehicle as it is very hard to work out the cause of the problem without doing basic checks on the vehicle which unfortunately cannot be done online
skatebreedUK 2 months ago
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الشيخ محمد الميكانيكه ا لف كيتاب اعطال السيارات وعبقري في التعديل عبقري في فن العطال العسيرة وهو فيصل شرع العشرينه بلك 31 محمول 01065526969
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531mmmmm 3 months ago
problem now fixed.i had shorted wires at the ecu.car now running again.fuel rail was ok afterall.thanks again for your help mandy.can you suggest a decent scantool as im now interested in fault finding.regards steve
subevo35 2 years ago
Hello Steve, in regards to your question this is our business. We design and manufacture scanner, scopes, DVDs, books, etc. Check out our ADPScan-1 or Scan-1 Diagnostics System. Our products are for the professional side of things. They're not just code readers.
In today's auto diagnostic world, what you need is massive loads of HELP. Most tools do not give you help. And help geared to your particular problem.
ADPTraining 2 years ago
Do a search for our free download for the ADPScan-1 or Scan-1. It also has lots of training on its Demo-Mode section. You can ever alter engine parameters and see how they impact operation, while seeing the interactive wiring diagram.
ADPTraining 2 years ago
Regarding the shorted wires that you found and corrected: Was the short caused by chaffing? My ECU wire bundles come from the factory simply wrapped in rubber tape. At 30k miles I took a good look at these bundles and found that the engine heat had accumulated at the front fender at top of strut exactly where the wrapped wires touched. There was three out of the four layers of rubber tape simply missing. I ended up wrapping the bundles in heat shield wrap and went to work on all radiating heat.
trainlinezoo 1 year ago
@trainlinezoo Good thinking, although that should have been done at the factory. Sometimes repairs like that are necessary, however. There might have been a recall for that particular issue. Good luck.
ADPTraining 1 year ago
great video.can you help with a problem with above system on my focus st170.fault code is p0193 which is fuel rail pressure sensor signal high.how do i check this sensor is good before i spend £155 on a new one.regards steve from scotland.
subevo35 2 years ago
Hello, I'll need a bit more info on your vehicle. But, I'll respond to the testing procedure question.
The key in understanding a fuel-rail press. sensor is this. It takes less fuel pressure for FUEL DELIVERY with a high vacuum engine, than with no vacuum. Remember that engine at idle (high vacuum) is sucking right at the injector. So less fuel pressure is needed. Then ECM will command less fuel pressure, fuel pump runs slower and end result: lower fuel pressure.
ADPTraining 2 years ago
That's all fine. Now, this sensor is easy to test. First make sure the vacuum line is connected and has vacuum. At idle you should get maximum vacuum.
If so, then disconnect connector and with DMM look for close to 5 volts. This is reference voltage.
Then look for sensor ground. Test against battery positive. Sensor ground is the same as batt ground.
Then intermittently jump 5 volt reference to the other third wire. This 3rd wire is the signal wire. Probe the ECM connector at signal pin.
ADPTraining 2 years ago
And verify changing voltage. If possible verify with scan tool. These steps will test the wiring.
Now then check your sensor output:
Reconnect sensor, and probe with DMM at the signal wire. Start engine, make sure you have fuel pressure to specifications (search data or Google), you should have between 1.5 to 3.5 volts, depending on LOAD and acceleration.
ADPTraining 2 years ago
You may also remove FRP sensor (disable fuel pump first) and test with compressed air. If sensor tests OK, problem may be at Fuel-Pump or circuit. Good luck.
ADPTraining 2 years ago
This looks like the Ford design...thanks for sharing.
loots66 2 years ago
Yes it is. FORD does all its fuel pressure control electronically, rather than using an in-tank fuel press. regulator (GM, Dodge, etc). So that the ECM varies the duty-cycle to the Fuel Pump, depending on fuel pressure. Thank you for the comment. Mandy...
ADPTraining 2 years ago
Comment removed
subevo35 2 years ago
In the GM's I've worked on the fuel pump pressure is fixed and rail pressure is maintained by a regulator (no electronics involved in the regulator).
RobertGary1 2 years ago
There are many GMs with variable fuel pressure. Fuel Rail pressure sensors are more prevalent in Fords. Most early variable fuel pressure systems were of two speed types. A simple module controlled fuel pump current. Good luck to all.
ADPTraining 2 years ago