gr8xr7 Posted May 24, 2018 Share Posted May 24, 2018 (edited) The fuel rail on the passenger side cracked, so, on the passenger side, I replaced the fuel rail, o-rings, spark plugs, and injectors, and the connecting hose across the front. Now it idles around 1500rpm then, after about 10 minutes, it revs up-then drops, then up, then-drops. What am I missing? Thanks in advance Edited May 24, 2018 by gr8xr7 Link to comment Share on other sites More sharing options...
Slartibartfast Posted May 25, 2018 Share Posted May 25, 2018 Sounds like you might have a vacuum leak between one of the injectors and the manifold. Link to comment Share on other sites More sharing options...
MY1PATH Posted May 25, 2018 Share Posted May 25, 2018 Replacing one side of the rail can unseat the other side. Even If you left it bolted the old seals will leak once disturbed even from wiggling the other side loose or twisting the hose off. Best to replace all 6 lower seals whenever you do any rail maintenance. Also, I prefer to use the vg33 one-piece rails, its solid tube across the front and no hose clamps to bother you when you navigate a coolant bypass hose into place.Also there are many hoses that can cause trouble under the manifold and if they've never been changed they are very prone to cracking when being handled.also moving the manifold around can dislodge some carbon/PVC residue that gums up the IACV, You can removed it and clean it, carefully take the Solenoid off the back and degrease the little plunger and spring, clean the casting it bolts to... Link to comment Share on other sites More sharing options...
gr8xr7 Posted May 25, 2018 Author Share Posted May 25, 2018 Thank you for your help. Indeed the fuel rail was't seated properly, (so a vacuum leak on one of the injectors). After redoing it, my Pathy runs perfectly. 1 Link to comment Share on other sites More sharing options...
mechanic58 Posted May 29, 2018 Share Posted May 29, 2018 Vacuum leak. One or some of the o-rings on the injectors on whichever side you had apart got ham-fisted when you put it back together. Now it's sucking air around an injector. Or several of them. Do over. Link to comment Share on other sites More sharing options...
mechanic58 Posted May 29, 2018 Share Posted May 29, 2018 Guess I should have read all the replies before posting. lol Link to comment Share on other sites More sharing options...
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