Date: Wed, 23 Oct 2002 11:55:38 -0400 From: KeithG <noonenopsamspring.com> Subject: Re: Long cranking after 9000T fuel pump replacement
If you switched the lines, I don't think it would run very well. You'll rupture a rubber line soon enough or it will blow off a line. Basically, you will be pressuring the rail and FPR to 90 psi. Double check to make sure the discharge of the pump goes to the filter, but I am guessing it is probably not the culprit. Some of the pump assys have a valve in BOTH elbows. Why, I do not know. They are different looking. They both allow flow in the proper direction for each elbow. If the supply checkvalve is bad, you should just replace it. Check to see if there is pressure on the fuel rail after setting overnight. Make sure that the supply line elbow is good. The return line 'valve' should be easy to remove with a blade and is not necessary. The walbro pumps do not have checkvalves as far as I know. KeithG Dave wrote: > I replaced the fuel pump on my '90 9000 turbo six months ago. The > pump died suddenly. Ever since there is a delay before the engine > starts - I have to crank the car for several seconds before the > engine fires. > > Now that winter is setting in the cranking time is getting longer and > the battery is suffering. I have been trawling the newsgroup for > ideas but have not found an answer. I have a couple of ideas which I > hope someone can comment on before I tackle the dreaded plastic fuel > pump retaining ring again: > > 1) I may have switched the fuel lines round causing the non return > valve to become useless. The reason I think this may be the cause is > that there is an insert in the return line in the boot and nothing in > the feed line. Does the return line have some sort of anti syphon > valve or is the insert I am seeing the non return valve? Would the > engine run in this state? > > 2) I may have lost the non return valve. When I pulled off the feed > line it was very tight and the non return valve may have fallen out > and landed halfway along the street (this is a long shot I know). Is > the valve this loose in the fuel line? > > 3) The old fuel pump may have included a non return valve and my > replacement does not? I did replace with the same Walbro pump but it > was not new. > > Any other ideas? > > Thanks, Dave. d_a_v_er_a_m_s_a_ynopsaml_k_2_1.c_o_m
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