My 86 had only 29,000 on it when the fuel pump went.
Fuel filter on backwards ( MAYBE )
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Joined: May 2005
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From: knox. tn.
Fuel filter on backwards ( MAYBE )
I noticed right after I had my fuel filter changed the car when it sat (over night ) took forever to start 
.I recently put a fuel press. gauge on & found out the pressure drops instantly from 42 to 0 when the car is turned off 
. Car use to start fine!!!!!Could the mechanic have put the filter on backwards & that be the problem?When he was changing the filter he was getting covered in fuel so I would say its a safe bet he wasn't paying attention..... 
1996 LT4 !!
.I recently put a fuel press. gauge on & found out the pressure drops instantly from 42 to 0 when the car is turned off . Car use to start fine!!!!!Could the mechanic have put the filter on backwards & that be the problem?When he was changing the filter he was getting covered in fuel so I would say its a safe bet he wasn't paying attention..... 1996 LT4 !!
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
gee... I don't think the filter will do that... it may be flow dependant, but I don't think it acts as a check valve.
And smell of war fuel? I would wonder if the check valve in the pump hasn't quit.
And smell of war fuel? I would wonder if the check valve in the pump hasn't quit.
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Joined: May 2005
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From: knox. tn.
Originally Posted by bogus
gee... I don't think the filter will do that... it may be flow dependant, but I don't think it acts as a check valve.
And smell of war fuel? I would wonder if the check valve in the pump hasn't quit.
And smell of war fuel? I would wonder if the check valve in the pump hasn't quit.
I agree but I've read alot of threads on bad fuel pressure being linked to a bad filter, I just find it hard to believe that a fuel pump with 58,000 miles on it is bad!!!
Instructor
Joined: Oct 2005
Posts: 108
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From: Acton, MA 1990 ZF6 Coupe, Z51
I had the same problem with my '90 after the filter change......Turned out the filter outlet line fitting was half a turn loose and leaking. The car was hard to start and pressure would drop from 42 to 0 like a rocket when shutoff...Tightening the fitting solved the problem 
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