Hey all! Just picked up a 91 ST185
- Thread starter Fhawman
- Start date
93celicaconv
Member
I quoted it because the test described bypasses the 2 relays you mention, and still the pump did not operate. Not saying their couldn't be a problem with one or both relays, but the test bypasses them. If the pump runs in the diagnostic port test, then I would say one or both relays you mentioned could be the source of the problem.
93celicaconv
Member
I think we are saying the same thing. The OP said he got power to the pump (+12VDC) after replacing a blown 7.5A IGN fuse (I also assumed leaving the +B & FP terminals jumpered), which was a change only due to the fuse being replaced, but even with the +12VDC power being present, the pump wouldn't run. The pump should have unless the pump itself is defective or if the ground is open circuited. One needs to get this right first, then try a start to make sure it runs, then stop the engine, pull the +B & FP jumper wire out, then try another start to see if it works. I guess this was the process I was thinking best.
Thanks for the suggestions guys, it really helps since I can only troubleshoot in short bursts, so it helps me focus and maximize my time.
For some silly reason I didn't check to see if the FP had power without the jumper, but I will tomorrow. I had the same concern as to why the IGN fuse was blown (maybe I did something during troubleshooting who knows).
Checking the ground wire continuity is a great suggestion also, easy to do. I did try to start it also with it jumpered and verified power to the FP, no go... So if the pump is running maybe I have a blockage, it was sitting for years with no gas in the tank, so that may have seized the pump, and also could have crapped up the tank....
The relay "looks" fine, not burnt. I saw how to test it and will check that tomorrow also. TO be continued....
For some silly reason I didn't check to see if the FP had power without the jumper, but I will tomorrow. I had the same concern as to why the IGN fuse was blown (maybe I did something during troubleshooting who knows).
Checking the ground wire continuity is a great suggestion also, easy to do. I did try to start it also with it jumpered and verified power to the FP, no go... So if the pump is running maybe I have a blockage, it was sitting for years with no gas in the tank, so that may have seized the pump, and also could have crapped up the tank....
The relay "looks" fine, not burnt. I saw how to test it and will check that tomorrow also. TO be continued....
FC Zach
Active member
Possibly but yeah, check that the pump is receiving power without the bridged diagnostic terminals. That will help rule some things out of the equation.Fhawman":2s19e5t6 said:
Well that's good news I guess. . sadly, you possibly have a bigger issue to deal with like bad fuel (and just how bad, is it still a liquid ? LOL). I'd check what comes out of the tank drain to see if still a liquid then check pressure at the rail before dropping the tank.Fhawman":2s19e5t6 said:
Just check to see if you have power without the bridged terminals and if so, it sounds like you have to deal with stale fuel, good luck!Fhawman":2s19e5t6 said:
underscore
Well-known member
If it sat without fuel for years you're going to want to drop the tank anyways to get a look in there. Assuming it's never been out there's 28 years worth of crud in the tank (not to mention any possible rust) just waiting for the worst possible time to clog up the intake sock and make the engine run lean.
Fhawman":358ycyts said:
I went the route of ST205 intercooler swap (plus supporting ST185RC hood and bumper), boost controller, and upgraded turbo turbine and compressor (CT27 mod)
Then just the usual goodies like brakes (braided steel hoses, speed bleeders, slotted rotors, performance pads), coilovers, wheels and tires.
Ok, update. I hadn’t had a chance to mess with it for a while until today. Got the tank out, glad I did, it’s a mess.
Lots of gunk and rust all over the tank. Pump was totally rusted up, as was the float on the sending unit. Working on cleaning it up now, will see if I’m successful. Got a new pump, and I think I got the float cleaned up and moving freely.
Did a few solvent rinses on the tank for varnish, now doing a dilute acid soak until morning.
Fun stuff.
Lots of gunk and rust all over the tank. Pump was totally rusted up, as was the float on the sending unit. Working on cleaning it up now, will see if I’m successful. Got a new pump, and I think I got the float cleaned up and moving freely.
Did a few solvent rinses on the tank for varnish, now doing a dilute acid soak until morning.
Fun stuff.
Update,
Got the tank clean, new FP, put the tank back in.
Replaced fuel filter (this is when I realized I didn't blow out the fuel line between the tank and the filer :bangshead:
Anyway, now the pump runs, car tries to start (fires and stumbles) but wont quite do it. Still runs fine on starting fluid.
So I'm guessing its either pluggage in the line I didn't blow out, or maybe injectors are varnished/stuck....
Got the tank clean, new FP, put the tank back in.
Replaced fuel filter (this is when I realized I didn't blow out the fuel line between the tank and the filer :bangshead:
Anyway, now the pump runs, car tries to start (fires and stumbles) but wont quite do it. Still runs fine on starting fluid.
So I'm guessing its either pluggage in the line I didn't blow out, or maybe injectors are varnished/stuck....
alltracman78
Active member
Pull the fuel line off at the fuel rail.
Crank the engine and see how much fuel you get.
Crank the engine and see how much fuel you get.
