Jesse J Posted July 1, 2021 Share Posted July 1, 2021 I replaced my stock injectors this morning for some Bosch 4 holes and now my truck idles very poorly. Almost sounds like a miss but not quite. I also replaced my spark plugs at the same time and I am mostly sure that I got the wires right. I have heard of when you replace and upgrade your injectors rough idle is normal? Not sure of the truth of that. But the more pressing issue is that where the return line off the vacuum connector it is leaking and I don’t know what I did to break it or how to fix it Link to comment Share on other sites More sharing options...
MiNi Beast Posted July 1, 2021 Share Posted July 1, 2021 Press in lines have a plastic clip to secure it with a rubber oring to seal it. Typically replace orings when take apart for good measure. May need to disconnect battery terminals and touch them together and wait 15 seconds or so and reconnect battery and then start up and let it run a bit and relearn things. All the mean while by all means double check everything you messed with and ensure all is good. Link to comment Share on other sites More sharing options...
Jesse J Posted July 1, 2021 Author Share Posted July 1, 2021 Ok I bet it’s an o ring then because I got the connector all the way in. And I did forget to touch the terminals together. What does that do exactly? Link to comment Share on other sites More sharing options...
scaleless Posted July 1, 2021 Share Posted July 1, 2021 Touching the terminals together would discharge any energy stored in the ECU, but it's probably not necessary. Additionally, I don't think the Renix ECU operates with any stored memory anyways, so that shouldn't be necessary. Link to comment Share on other sites More sharing options...
Jesse J Posted July 1, 2021 Author Share Posted July 1, 2021 6 minutes ago, scaleless said: Touching the terminals together would discharge any energy stored in the ECU, but it's probably not necessary. Additionally, I don't think the Renix ECU operates with any stored memory anyways, so that shouldn't be necessary. what would you then suggest to fix the issue Link to comment Share on other sites More sharing options...
scaleless Posted July 1, 2021 Share Posted July 1, 2021 For the leaking return line, buy Dorman 800-013. It comes with 3/8 and 5/16 fuel o rings, you want the 3/8. As for the idle miss, first ensure all your spark plug wires are firmly seated on the plugs. It's very easy to have them slightly off. Did you gap your plugs properly? I don't think you mixed up the firing order, otherwise it would be a very bad miss, but do consult this image: What model number are your injectors? Link to comment Share on other sites More sharing options...
Jesse J Posted July 1, 2021 Author Share Posted July 1, 2021 32 minutes ago, scaleless said: Did you gap your plugs properly? pre gapped. I will confirm if the wires are seated tomorrow Link to comment Share on other sites More sharing options...
jdog Posted July 1, 2021 Share Posted July 1, 2021 What kind of plugs? Link to comment Share on other sites More sharing options...
scaleless Posted July 1, 2021 Share Posted July 1, 2021 "Pre-gapped" just means "probably close enough" Link to comment Share on other sites More sharing options...
jdog Posted July 1, 2021 Share Posted July 1, 2021 And 1 hour ago, scaleless said: "Pre-gapped" just means "probably close enough" And in a perfect shipping world won't have anything happen to them. Link to comment Share on other sites More sharing options...
Jesse J Posted July 2, 2021 Author Share Posted July 2, 2021 9 hours ago, jdog said: What kind of plugs? ngk Link to comment Share on other sites More sharing options...
Jesse J Posted July 2, 2021 Author Share Posted July 2, 2021 my money is on a spark plug wire and bad fuel pressure Link to comment Share on other sites More sharing options...
scaleless Posted July 2, 2021 Share Posted July 2, 2021 Well those can both easily be checked. Slide the boot off the end of the wire to check the crimps at the end, and put a fuel pressure gauge on the rail. Boom, diagnosis. Link to comment Share on other sites More sharing options...
jdog Posted July 2, 2021 Share Posted July 2, 2021 6 hours ago, Jesse J said: ngk Cooper core I hope Link to comment Share on other sites More sharing options...
JMO413 Posted July 2, 2021 Share Posted July 2, 2021 2 hours ago, jdog said: Cooper core I hope Copper core don't come pre gapped as far as I know. Link to comment Share on other sites More sharing options...
cruiser54 Posted July 2, 2021 Share Posted July 2, 2021 NO spark plug comes pre-gapped. My money is on the line from throttle body to MAP sensor got messed up in the process. Low vacuum to MAP equals pig rich running. Renix ECU doesn't need resetting either. I've done tons of Renix injector upgrades and they started right up and ran great. Link to comment Share on other sites More sharing options...
Jesse J Posted July 3, 2021 Author Share Posted July 3, 2021 So now it doesn’t want to start it sounds like a fuel issue to me I put new gas in it Link to comment Share on other sites More sharing options...
jdog Posted July 3, 2021 Share Posted July 3, 2021 what injectors did you install? Link to comment Share on other sites More sharing options...
Jesse J Posted July 3, 2021 Author Share Posted July 3, 2021 28 minutes ago, jdog said: what injectors did you install? Don’t have the link but some Bosch 4 hole injectors they are yellow Link to comment Share on other sites More sharing options...
Jesse J Posted July 3, 2021 Author Share Posted July 3, 2021 So timeline. I wanted to get my truck running a little better so I decided to invest in some coolant, spark plugs , injectors, upgraded headlight harness (because my buddy’s truck burnt down recently and I don’t want the sameness to happen to mine) so Tuesday I flushed my coolant with a bunch of distilled water and put a new thermostat in and put new 50/50 in Wednesday I did half of a c101 delete and got a new fuel filter in thirday I finished my c101 delete and started it up and it took a second to fire up because I had drained the lines for the fuel filter but it was running much better after that. And I thought I would start it up before my injectors and my spark plugs just so if it was running bad I new it wasn’t the delete. So then I put the sparks and injectors in about the same time and again took a second to fire up but it did and idled and ran not ver smoothly and then I couldn’t get it to start this morning because of I thought I ran out of fuel because it was on empty and I had a fuel leak with doesn’t help. So I bought a new o ring witch fixed the fuel leak and put some gas in and charged the battery still nothing. I broke the vacuum hose that comes out of the throttle body right under the tv cable a while back because brittle 35 year old plastic but it was running fine with some aluminum tape but the tape fell off so I taped it again today to no prevail Link to comment Share on other sites More sharing options...
jdog Posted July 3, 2021 Share Posted July 3, 2021 pull your plugs, i'm thinking your injectors are stuck open or not correct for the vehicle, get a picture of em and post it up Link to comment Share on other sites More sharing options...
Jesse J Posted July 3, 2021 Author Share Posted July 3, 2021 Ok. Why pull spark plugs? Link to comment Share on other sites More sharing options...
JMO413 Posted July 3, 2021 Share Posted July 3, 2021 7 minutes ago, Jesse J said: Ok. Why pull spark plugs? See if they are wet. Covered in fuel. Link to comment Share on other sites More sharing options...
jdog Posted July 4, 2021 Share Posted July 4, 2021 Link to comment Share on other sites More sharing options...
Jesse J Posted July 5, 2021 Author Share Posted July 5, 2021 Yes spark plugs dripping wet Link to comment Share on other sites More sharing options...
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