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8 votes

Can't find schrader valve

As long as you have Tuned Port Injection (TPI), the Schrader valve is located at the back of the fuel rail on the passenger side (near the distributor). You have to use a 90° elbow in order to attach ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes
Accepted

Can't get a fuel pressure reading

So I went out today and ran the fuel pump for a few seconds with the return line clamped off and saw that the amperage draw went up to 5.85 amps and the sound of flowing fuel stopped. At first I just ...
Robert S. Barnes's user avatar
3 votes

How Much Pressure Drop across the fuel filter is normal / acceptable?

This will all depend on the type of fuel pump that your vehicle uses. The stronger the pump, the larger the pressure difference it can manage. If you wanted to calculate a theoretical limit, I guess ...
wesanyer's user avatar
  • 864
3 votes
Accepted

Do I have a fuel pressure or injector problem, or am I just chasing ghosts?

Realistically I'd redo your test using a little more accurate of a timing sequence. Two things to really make it more accurate: Use some sort of stopwatch (apps for cell phones are free). Doing so ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes
Accepted

Do I have a fuel pressure or injector problem Part 2

Sounds like your pressure fuel pump is 100%. Pressure regulator could be off. If your above 30psi after 5 mins you are probably OK. The pressure regulator works by bleeding pressure back to the tank....
Dirk Broer's user avatar
2 votes

Why are there separate Fuel Pressure Regulator and Maximum Fuel Pressure Tests?

There are two values for the pressure since the maximum pressure is achieved at low or zero flow when the engine is not running and the other when the engine is consuming fuel. It is possible that the ...
Solar Mike's user avatar
  • 34.6k
2 votes

Do fuel pressure regulators allow some fuel to flow even when not turned on?

In most cars, the fuel system should hold the pressure for quite a while. You shouldn't see a significant drop in fuel pressure after engine/pump shut off. What you are probably experiencing here is ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes

Diesel engine problems only in summer

Use your scan tool to check the coolant temperature when the engine is cold and when it is hot. If either temperature is not plausible, you may need a new coolant temperature sensor. If your car also ...
MTA's user avatar
  • 6,549
1 vote
Accepted

Replace Old fuel filter or Fuel Pump | Dilemma

Both the fuel pump and the filter are inside the fuel tank and are accessed via a panel under the rear seat. So as long as you're in there it would be easy enough to replace the filter, re-install, ...
jwh20's user avatar
  • 12.1k
1 vote
Accepted

Fuel Filter Bypass Valve Opening Pressure Differences

Seeing as my other answer was not correct in this case, I would propose that the reason there is a bypass valve is to ease the load on the pick up fuel pump while there is low demand for fuel by the ...
HandyHowie's user avatar
  • 25.4k
1 vote

Is common-rail unreliable by nature?

Earlier diesels had separate high pressure pipes to each injector and injectors still failed. The conditions injectors have to work in and what has to be achieved (in terms of spray pattern and spray ...
Solar Mike's user avatar
  • 34.6k
1 vote

How Much Pressure Drop across the fuel filter is normal / acceptable?

I decided to buy a new fuel filter, and measure after the old filter, and before and after the new filter. I let it idle two minutes before taking each reading. After the old filter, which had been ...
Robert S. Barnes's user avatar

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