hgeranium Posted Tuesday at 06:10 AM Share Posted Tuesday at 06:10 AM I haven't had any issues with my throttle sticking lately after doing all sorts of fixes, but that has allowed me to notice a pattern. On cold starts, the truck will start up (a lot of times in very few cranks) smoothly with a quiet and reserved rev up and back down (~1500RPM). I get this turning the truck on before and after work. When it's warm and I am constantly turning it off and on (running errands), The revs are significantly higher and the startup feels more 'jolty' rather than smooth, and always takes way more cranks to start than when cold (revs closer to 2000-2200). I am going to assume that the new IACV is indeed good and not crap out of the box. Yes, my manifold bolts are tightened. All vac lines are good. I am no longer (as of right now) having an idle issue, it's just with startup. I know my truck and I know it's not normal. It hasn't always started like this, cold or warm. I'm thinking that the heat of the engine is exacerbating an issue regarding the intake/exhaust manifold. Maybe the heat is expanding a small intrusion in the manifold gasket that allows for a small vacuum leak on startup, that is absent on cold starts as the cold gasket compresses and seals the gap. If I'm having a vacuum-related issue that is contingent on engine temperature, I feel like it has to be the manifold gasket, right? At this point, I've suspected it enough that I might as well do it just to cross that off the list. I mostly wanted words of affirmation that I could be on the right track because if I'm about to do this job I want to be confident that it's going to fix stuff lol. Link to comment Share on other sites More sharing options...
ghetdjc320 Posted Tuesday at 06:28 AM Share Posted Tuesday at 06:28 AM For manifold gasket, grab a Remflex. They seal up exceptionally well. Link to comment Share on other sites More sharing options...
hgeranium Posted Tuesday at 06:46 AM Author Share Posted Tuesday at 06:46 AM 17 minutes ago, ghetdjc320 said: For manifold gasket, grab a Remflex. They seal up exceptionally well. Thank you! I'll spend all the extra money I can to make sure I never have to do this job again lol Link to comment Share on other sites More sharing options...
ghetdjc320 Posted Tuesday at 07:01 AM Share Posted Tuesday at 07:01 AM 14 minutes ago, hgeranium said: Thank you! I'll spend all the extra money I can to make sure I never have to do this job again lol The remflex don’t cost much more you just have to order them in. Link to comment Share on other sites More sharing options...
89 MJ Posted Tuesday at 01:04 PM Share Posted Tuesday at 01:04 PM Do you still have the metal heat shield for the fuel rail? Link to comment Share on other sites More sharing options...
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