ARRGGGH! Failed emissions again...
#18
Three Wheelin'
Thread Starter
#20
Three Wheelin'
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#21
Sure can, give me a call when you are almost there and I'll see if I can get away for a few minutes.
#22
Three Wheelin'
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#23
Don't have either in stock but can get same day if we need one, delivery is usually around noon.
#25
Archive Gatekeeper
Rennlist Member
Rennlist Member
Fuel Pressure Regulator = located between the passenger side rear of the fuel rail and the rear "U" fuel hose.
Damper = two of them, front one is between fuel inlet line, the front of the driver's side fuel rail, and the the front crossover hose. The rear one is on the driver's side in back. They 'dampen' fluctuations in fuel pressure generated by the external fuel pump.
All have a rubber vacuum elbow attached. Pull the 3mm plastic hose out of the elbow and pull a vacuum on each damper or FPRwith your mityvac. They should hold vacuum. If they don't you have a split diaphragm.
Here's a shot of an FPR's guts:
Damper = two of them, front one is between fuel inlet line, the front of the driver's side fuel rail, and the the front crossover hose. The rear one is on the driver's side in back. They 'dampen' fluctuations in fuel pressure generated by the external fuel pump.
All have a rubber vacuum elbow attached. Pull the 3mm plastic hose out of the elbow and pull a vacuum on each damper or FPRwith your mityvac. They should hold vacuum. If they don't you have a split diaphragm.
Here's a shot of an FPR's guts:
#27
Race Car
My high-flow cats have been good for 4 years worth of Atlanta emission inspections so far, but I have a wideband gauge so I know my car's AFR is good all the time.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C 475hp/460lb.ft
#28
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Join Date: Oct 2009
Location: Michigan... Grand Rapids
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That told me I need new dampers, and new plug wires.... and almost a whole new car!!
This could very well be your problem. Does the car tend to start hard when warm?? If so that's a bid tell tale sign
#29
Rennlist Member
Huh..ive had a ton of cars..turbo and not..and not one..ever had a failed damper, much less a vacuum port on it.
A few manuf's do, but by far not all in a cursory search on google, and few aftermarket ones as well.
Not worth retrofitting, just wondering.
A few manuf's do, but by far not all in a cursory search on google, and few aftermarket ones as well.
Not worth retrofitting, just wondering.
#30
Race Car
Dan
'91 928GT S/C 475hp/460lb.ft