| Author |
Message |
David Prall (Davidpra)
Junior Member
Username: Davidpra
Post Number: 83
Registered: 2-2001
| | Posted on Tuesday, April 09, 2002 - 11:27 am: | |
You should only feel resistance (in either of the 2 sensors and at any point in their travel) when the fuel pressure is in spec. Fuel pressure provides the resistance while running, and a residual holding pressure functionality in the system maintains a small volume of fuel at system pressure after the engine shuts off to allow good restarting.
(3) things I would check (in this order) are as follows: 1) Make sure you are checking resistance only once and immediately after shutting the engine off -- once you've exercised the meter travel a few times, the pressure volume will be expended, and you should normally feel no resistance until the fuel pump operates again; 2) Do a fuel pressure check on each side of the system at the Fuel Distributors to confirm that they are equal and in spec; 3) If 1 & 2 check out, try swapping the units in the system. The easiest way to do this is to re-route the fuel supply from one unit over to the other (a little custom plumbing may be required). Alternatively, you can remove each unit (w/ fuel distributor) and exchange their positions.
If the problem follows the unit, i.e., the bad air flow sensor is still bad with the switched fuel supply, then it's time to investigate the sensor plate and its mountings for defects (bad bearing, broken pivot support, etc.). If the sensor checks out, the associated fuel distributor is likely defective. And, then, I'm sorry to say, the password is "$$OUCH$$". |
Craig Dewey (Craigfl)
Member
Username: Craigfl
Post Number: 337
Registered: 1-2001
| | Posted on Tuesday, April 09, 2002 - 6:42 am: | |
What was the car doing or not doing that led you to suspect the air flow sensor? |
Tom Bakowsky (4retom)
New member
Username: 4retom
Post Number: 3
Registered: 3-2002
| | Posted on Sunday, April 07, 2002 - 4:10 pm: | |
Try removing the fuel distributor and checking the pintel on the bottom moves freely. Do this by holding the distributor right side up and with your other hand push the pintel up as far as it will go,then release it. the pintel should drop back down under it's own weight. If not try to lube it up. hope this helps. |
dave swigler (Dwswigler)
New member
Username: Dwswigler
Post Number: 2
Registered: 4-2002
| | Posted on Saturday, April 06, 2002 - 10:51 am: | |
This is my first entry so bear with me. My 86 TR has a problem in the rt side air flow section of the injection. The airflow plate does not provide any resistence to a downward push with the finger until about 1/4" of travel even after adjusting the adjustment gland nut on the metering unit piston. Right now I have the adjustment about flush with the end of the outer locking nut. Any ideas will be appreciated on this one. I am in a small city and there are no Bosch experts here and I hesitate to have a local mechanic "experimenting" with the car. |
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