Question about 1993 Chevrolet S-10
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Posted on Jan 02, 2017
i had the the same problem. did a fuel pressure check every thing was fine, except for a few sticky injectors. so i suggest get that checked befor doing anything else.
Posted on Jan 18, 2009
Check both O2 sensor(s) and catalytic coverter.. P0420 means catalyst below threshold. Also check the sensor at the transmission and solenoid.
Posted on Feb 06, 2009
Do you have the fuel tester hooked the in the overgrown air valve on the fuel rail in the back of the engine? Or do you have the fuel line unhooked in the back and hooked to the pressure pump? You want the fuel pressure to be in that 60 lb range so if you are hooked into the pressure valve on the fuel rail allowing fuel to go through, then I am betting it is the fuel pressure regulator. To get to that, you have to take the throttle body off and take the plastic plenum that covers the injector packs. On the back of the mount where your six pack of injectors are sits the pressure regulator. If it is faulty then it is dumping fuel instead of holding the pressure like it should.
Get a Chilton or Clymer manual and it shows you in pretty good detail how to fix it. I've done it to my 98 S10 with the same engine.
If you unhooked the fuel line so you are losing pressure from the line back to the pump then I would say your pump is letting fuel back to the tank when it shuts off. My money is on the first possibility though.
Posted on Mar 28, 2009
Had a similar problem and turned out to be a fuel regualtor.
Be careful with the little o-ring. Tricky little devil.
There may be residual pressure in the line so be careful you don't take a shower in gasioline.
It was hard to start after warm up. Rough idle until driving. Then on shut off it was hard to start.
Posted on Sep 04, 2010
SOURCE: 1997 Chevy Suburban Changed fuel
There is a fuse that deals with the fuel pump circuit through the ECM. If you haven't checked it's in the fuse panel under the hood in the engine compartment on the drivers side by the brake master cylinder. I hope that you have a cover for it with the names of the fuses. The fuse you want to check will be the fuse marked "ECM B". I gave you a picture of the fuse layout but it's not a good one but I did put an arrow to the one I think it is. I pretty sure that's the one but not 100 percent because it's pretty blurry. In any case there is a fuse marked "ECM B". I would check there if you haven't already. Other than that You may have to check your wiring. There is a fuseable link at the starter you may want to check if that fuse isn't blown. I hope this helps and good luck.
Posted on Aug 04, 2011
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