drcomanche Posted January 17, 2012 Posted January 17, 2012 So, I decided to undertake a more difficult repair today, and replaced my exhaust manifold, fuel injectors, and gaskets. It went smoothly, I reinstalled everything, but when i went to start it, it is missing BAD. I pulled plugs to see what wasnt going and cylinder 6 isnt firing at all anymore. I didnt have a chance to check any others before it stalled out. It smelled like solid gasoline everywhere, but there was no leaking. I restarted it and this time unplugged my Air charge temp sensor and the engine didn't change at all. Whenever I rev it slightly, it stutters when I let go and almost stalls. After about a minute running I can hear it very loudly start to pull in as much air as possible causing the engine rpms to slightly rise. I went to autozone and bought a new air charge sensor, but it still isn't doing anything. It's smoking a lot, and I'm not sure what the problem is. Considering this is my daily driver, I need it back up and running asap... Any help is greatly appreciated.
cody4359 Posted January 17, 2012 Posted January 17, 2012 did you label the injectors and plug them back in in the correct places, and connect the vaccum line
ComancheKid45 Posted January 17, 2012 Posted January 17, 2012 Check your MAP sensor, likely the vaccum line is unplugged ;)
drcomanche Posted January 17, 2012 Author Posted January 17, 2012 labeled all the injectors. No problems there(it also helps that all the wires are, more or less, bent to exactly where they need to be. I just checked the MAP sensor. Its plugged in via a vacuum hose and all connections are good.
cody4359 Posted January 17, 2012 Posted January 17, 2012 i see that you replaced the injectors, maybe re-install the old ones to elimanate the possibility of wrong/bad injectors??
drcomanche Posted January 17, 2012 Author Posted January 17, 2012 That may be my only choice. I don't see where it could have gone wrong though. They were specifically for the vehicle.
cody4359 Posted January 17, 2012 Posted January 17, 2012 double check that you o2 sensor is plugged in, if you disconnected it. i forget where they are on a renix
drcomanche Posted January 17, 2012 Author Posted January 17, 2012 I didn't have to disconnect it, and, although I have a replacement, it hasn't prompted action.
drcomanche Posted January 17, 2012 Author Posted January 17, 2012 Well, figured it out. It appears that the injectors I purchased didn't actually fit the model year they were advertised for. Quite an inconvenience, but I knew the fuel rail wasn't sitting right. The fuel injectors(the new ones) look a bit worse for the wear now. They didn't fit the hole in the intake manifold quite right, so it bent some of the edges on them. I'm wondering now if maybe this was an earlier year manifold? Was there a difference between years for injectors?
FrankTheDog Posted January 17, 2012 Posted January 17, 2012 I see that you have a 94 engine in there. Which manifold are you using? The renix or the HO?
drcomanche Posted January 19, 2012 Author Posted January 19, 2012 I'm pretty sure it's the HO unit. I bought the injectors from someone claiming they would fit for that year...
Eagle Posted January 19, 2012 Posted January 19, 2012 They should fit regardless of year. Guys with Renix strokers often run injectors from HO XJs or various years of ZJ. And a preferred replacement for the Renix injectors is the injectors for a 5-litre Mustang.
drcomanche Posted January 19, 2012 Author Posted January 19, 2012 Well, in any case, the injectors were too large at the end that was supposed to slip through the hole in the manifold.
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