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HELP! Need to pass emissions tomorrow 700 1990

uid 18083's pic
posted by  lucid on  Fri Jul 15 11:03 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Fuel pressure reads about 34PSI @ idle, goes up a bit when revving

Ken, I'll quote the Regina FI greenbook and let you draw your own conclusions (I have trouble getting my head around Kilopascals & such). [my words in brackets]

[Prior to FPR check, pump is jumpered and pressure checked for 43.5 psi. This is with engine off -- atmosphere (i.e., simulated WOT) on FPR diaphragm. Pump still running on jumper wire...]


Checking the pressure regulator
— Connect a vacuum pump to the regulator
— Pump the air out of the regulator [no specific vacuum amount given]

Check that the drop in system pressure matches the drop
in pressure in the regulator. [kPa, HG, psi??? this confuses me]

300kPa (43.5 psi) — negative pressure = system pressure

— Disconnect the hose from the vacuum pump.
System pressure should return to 300l kPa.

[Anyhow, your 34 psi at idle sounds like Bentley's LH 2.4 criteria -- about 9 psi below the WOT 43.5 psi]



--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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