Gregoryb Posted August 14, 2023 Share Posted August 14, 2023 So I had a long crank to start problem and fuel pressure fast drop after shut off so I replaced the fuel pump and the pulsator was shot after that started right away now it’s starting to take a long time to start again and pressure drops after shut off not as fast but fast I don’t get it geerr fuel injection? Link to comment Share on other sites More sharing options...
2seater Posted August 14, 2023 Share Posted August 14, 2023 Did you install a new pulsator or the short substitute hose that usually comes with a new pump. If the hose was installed, was it clamped in place? 1 Link to comment Share on other sites More sharing options...
Top Down Posted August 15, 2023 Share Posted August 15, 2023 I had a similar problem on 2 Reattas. One was fixed with a new fuel pump, and the other one with a new fuel pump relay. Link to comment Share on other sites More sharing options...
Gregoryb Posted August 15, 2023 Topic Author Share Posted August 15, 2023 Yes used hose and clamps are tight Link to comment Share on other sites More sharing options...
Gregoryb Posted August 15, 2023 Topic Author Share Posted August 15, 2023 When you shut the car off the pressure should stay up for how long? Link to comment Share on other sites More sharing options...
Ronnie Posted August 15, 2023 Share Posted August 15, 2023 Look in the how-to guide for fuel pressure testing. Link to comment Share on other sites More sharing options...
Gregoryb Posted August 15, 2023 Topic Author Share Posted August 15, 2023 Yeah I probably got a leaker that’s probably why it idles roughly sometimes and exhausts smells strong. when I put the new pump and bypass hose in that wasn’t helping is a hair slower drop now. can I replace one at a time with different name brands? Link to comment Share on other sites More sharing options...
Gregoryb Posted August 15, 2023 Topic Author Share Posted August 15, 2023 Probably no way to test them Link to comment Share on other sites More sharing options...
Gregoryb Posted August 15, 2023 Topic Author Share Posted August 15, 2023 Injectors that is Link to comment Share on other sites More sharing options...
2seater Posted August 15, 2023 Share Posted August 15, 2023 There are ways to test but it requires some form of fixture to hold them. You can leave them attached to the fuel rail and lift them up out of the manifold so the tip of the injectors are visible and then pressurize the rail with the key on. If there is a leaker, it will spray of drool fuel. It requires a bit of wiggling and twisting to get them to release, especially if they have never been removed before. Yes, they can be replaced but all of them must match when finished. Lots of places on the net to get good used takeouts. You want ~19#/hr Bosch Type 3 for best upgrade. Must have EV1 electrical connection and the groove at the top for the retainer clip in the rail. Sets are plentiful and very reasonably priced. Link to comment Share on other sites More sharing options...
Ronnie Posted August 15, 2023 Share Posted August 15, 2023 Although rare, it's possible the fuel pressure regulator is allowing the pressure to escape down the return line when the pump is off. 1 Link to comment Share on other sites More sharing options...
Gregoryb Posted August 16, 2023 Topic Author Share Posted August 16, 2023 I’m just going to try replacing all the injectors Link to comment Share on other sites More sharing options...
Ronnie Posted August 16, 2023 Share Posted August 16, 2023 1 hour ago, Gregoryb said: I’m just going to try replacing all the injectors Sounds like a plan. Let us know how it turns out. Link to comment Share on other sites More sharing options...
Gregoryb Posted September 7, 2023 Topic Author Share Posted September 7, 2023 Update instead of putting injectors in I had my mechanic install a $10 check valve in the back fuel line starts perfectly now Link to comment Share on other sites More sharing options...
Gregoryb Posted September 7, 2023 Topic Author Share Posted September 7, 2023 Eventually I will replace the injectors does anyone know if smp injectors are any good? Link to comment Share on other sites More sharing options...
Ronnie Posted September 7, 2023 Share Posted September 7, 2023 1 hour ago, Gregoryb said: Update instead of putting injectors in I had my mechanic install a $10 check valve in the back fuel line starts perfectly now Thanks for letting us know. It might help someone in the future who have the same problem. 1 Link to comment Share on other sites More sharing options...
Gregoryb Posted September 7, 2023 Topic Author Share Posted September 7, 2023 I got the check valve off of Amazon 1 Link to comment Share on other sites More sharing options...
2seater Posted September 7, 2023 Share Posted September 7, 2023 5 hours ago, Gregoryb said: Eventually I will replace the injectors does anyone know if smp injectors are any good? Do you have a link to them? That sounds like a vendor rather than an injector brand. Your original injectors should be Bosch 280150901. They were only used in the 3800 in the Reatta years but even Walmart offers refurbed ones. Something like these would be the type 3 upgrade: 6 Genuine Bosch Fuel Injectors For 87-98 JEEP Cherokee 4.0 0280155710 EV1 4 hole | eBay Link to comment Share on other sites More sharing options...
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