Beamercub Posted November 16, 2023 Share Posted November 16, 2023 When this happens, in the past the remedy has been coil replacement.. All 3 times coil packs were replaced under warranty. Second time around the spark plugs were replaced. Couple things, with the weather change I have noticed the car starting ( turning over ) very slow - 2 year old battery.. I also recently got gas at a gas station I don't go to - could it be bad gas? I was thinking of pro-actively replacing the battery and I added a bottle of HEET to the tank.. Problem seemed to be less frequent with the addition of HEET. Hooked it up to code reader and no codes are being reported. I remember a tech telling me once that the common issue with the 3.6R is cylinder 5 ( coil ).. Due to it's location and exposure.. I haven't tackled the coils myself to date... Anyone else have a similar issue>? Link to comment Share on other sites More sharing options...
ammcinnis Posted November 16, 2023 Share Posted November 16, 2023 Reality check: Please edit the thread title. 2 "If you don't know where you're going, any road will take you there." ~ The Cheshire Cat (Alice in Wonderland) Link to comment Share on other sites More sharing options...
Beamercub Posted November 16, 2023 Author Share Posted November 16, 2023 What might you suggest? Reality check? Seriously? Link to comment Share on other sites More sharing options...
ronemus Posted November 16, 2023 Share Posted November 16, 2023 (edited) Unless VERY heavily modified, your engine would resemble a large grenade at 10,000 rpm, much less 15,000! Edited November 17, 2023 by ronemus 1 Link to comment Share on other sites More sharing options...
MoleMan Posted November 17, 2023 Share Posted November 17, 2023 On 11/15/2023 at 6:10 PM, ronemus said: Unless VERY heavily modifier, tour engine would resemble a large grenade at 10,000 rpm, much less 15,000! Second that In all reality the Red bottle Iso-Heet is ok for both a water remover and I injector cleaner the yellow is jiat a water remover and will do nothing. Fill up next time at a brand name station using supreme and add a bottle of Techron and see what happens. The winter blend will make the car run like crap for a month or so before a constant cold temp stays. With me I rarely drive my 3.6 so I put 91 octane ethanol free fuel in and it runs like a champ. If you have no codes it's not the coil packs. They should run a code if they are bad. Same with a bad plug. OEM coil packs are not cheap at all. I would not just throw parts at the car. Try the Chevron premium and Techron method and go for a long highway drive and see what happens. 1 Link to comment Share on other sites More sharing options...
Beamercub Posted November 20, 2023 Author Share Posted November 20, 2023 Yikes, those RPM's do seem a bit HIGH. I really appreciate the advice! I hadn't thought about a winter blend of fuel being an issue.. It does seem that this issue appears around this time of year... I am religious about getting gas from the same place, I was in a pinch.. Another reason, why I could never have an all electric car.. I would suffer from range anxiety. I just went out and OBD said no codes. I'm going to go back to my trusted gas station ( getting 93 this time ) and I will try a bottle of Techron. Another thing I noticed, I'm getting about 3mpg less with this past fill-up. I'm also going to replace the battery. It has been getting down to 35f at night around here and when I start the car in the morning it's cranking very slow.. Better to be pro-active, eh? I'll circle back in a couple days.. Link to comment Share on other sites More sharing options...
waldguy Posted November 21, 2023 Share Posted November 21, 2023 7 hours ago, Beamercub said: At 10K rpms, you should be going for jet fuel only, high octane As for the battery, two years old isn't much. Get it load tested before replacing. Link to comment Share on other sites More sharing options...
madmax988 Posted December 11, 2023 Share Posted December 11, 2023 Assuming the OP actually means 1000-1500 rpms it could be something to do with idle, like a mass airflow sensor or idle air control module. 1 Link to comment Share on other sites More sharing options...
Beamercub Posted December 22, 2023 Author Share Posted December 22, 2023 Yes, the RPM's are wrong. Too many OOO -0000. 1 Link to comment Share on other sites More sharing options...
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