cadillac fuel pressure problem
 

92 cadillac deville 4.9l engine

i know its not a honda but im trieing to fix this car so i can have my honda as the weekend driver.. i bought the car for $450 and it was a little slugish. i got a new cat and the muffler taken out with a straight pipe.. it didnt help much. so driving home this was a week after i bought the vehicle.. when i came to a stop light the car died.. and sometimes it wont start.. i replaced the fuel filter. so i got a pressure tester.. and i read 4psi key on no start. and with car running it goes to 35 and drops down to 20psi after 30 seconds of the car running.. i switch off the car and it goes down to 0 psi after a 5 seconds.. when i unplug the vacuum line on the fuel pressure regulator the psi on the guage goes up about 6 psi... any suggestions or tests i should do next.. so my symptoms are
car wont start sometimes
takes 5 times turning the key to get it started.
car runs rough and idles at 1300 rpm hot or cold
dies when coming to a stop
no power after a minute of driving wont go past 10mph

Re: cadillac fuel pressure problem
 

Lack of fuel, sounds like dying pump or cruddy wiring. Sounds like your FPR is working right tho. Get back there on the pump and hotwire it, both power and ground as either one could be sucking, see if she likes it.

That 4.9 is a rare find, most have the crappy 4.1 that dies all the time and takes forever to put a water pump in *correctly* with how the front engine plate should really be taken off.

Re: cadillac fuel pressure problem
 

replace the ------- shitty GM pump with a Walbro from A.P.E.

Re: cadillac fuel pressure problem
 

i never knew gm to have a good fuel setup. stupid in-line bullshit always went with it

Re: cadillac fuel pressure problem
 

Step away from the internet, Jon, and go put a fuel pump in a Yukon.

Re: cadillac fuel pressure problem
 

fuel pumps is one of the reasons I do not like buying domestic cars.
After being the in the parts biz for 11yrs. I have observed that to own a GM car you will replace a fuel pump, battery, alternator, starter, and fuel filters (at least 10 times) in the first five years of ownership. And if you are really unluck certain trucks and suvs you had to have either replaced or rebuild the tranny with in the same five yrs.

Re: cadillac fuel pressure problem
 

Sounds like my truck when the pump went. I replaced it twice in a year with a local part store one before I bought a GM one the third time and never had a problem since.

Re: cadillac fuel pressure problem
 

ill put some pumps on yourmom instead :y

Re: cadillac fuel pressure problem
 

Don't make me mail the old ----- to your return address, cocknuzzler.