joshrichard Posted November 16, 2018 Share Posted November 16, 2018 The truck will try to turn over but only crank. After usually 2 or 3 tries it will turn over but super harsh and die then when i try it again it’ll start and the rpms will shoot up then go down and all the lights and everything will turn off like it dies then it will go back up and level out. I have a video but can’t figure out how to put it on here. Link to comment Share on other sites More sharing options...
mjotrainbrain Posted November 16, 2018 Share Posted November 16, 2018 I'm sorry, I don't know what's up with your Pathy, but I suggest uploading the video to YouTube and linking it here. Link to comment Share on other sites More sharing options...
joshrichard Posted November 16, 2018 Author Share Posted November 16, 2018 I forgot to mention it is mainly in the cold. when i park in the garage it will start up just fine. This video isn’t the best but it shows the problem Link to comment Share on other sites More sharing options...
Wacky_Pathy Posted November 16, 2018 Share Posted November 16, 2018 Could be an alternator problem. Just fixed my dads blazer with the same issue. 1 Link to comment Share on other sites More sharing options...
Zraver Posted November 17, 2018 Share Posted November 17, 2018 On 11/15/2018 at 11:40 PM, Wacky_Pathy said: Could be an alternator problem. Just fixed my dads blazer with the same issue. Christmas display on dash is alternator until ruled out. Hook your pathy up with another vehicle running right via jumper cables. see if the delivery of good voltage fixes the problem if it does, or at least makes it better there is the first thing to fix. 1 Link to comment Share on other sites More sharing options...
TowndawgR50 Posted November 17, 2018 Share Posted November 17, 2018 (edited) Alt issues are indicated by this series of lights ( AT oil temp, seatbelt, brake, battery, check engine) while the engine is running. https://imgur.com/a/8r0Zf Edited November 17, 2018 by TowndawgR50 Link to comment Share on other sites More sharing options...
joshrichard Posted November 17, 2018 Author Share Posted November 17, 2018 Alt issues are indicated by this series of lights ( AT oil temp, seatbelt, brake, battery, check engine) while the engine is running. [/img]https://imgur.com/a/8r0ZfI see, thank you. I ran the codes and I don’t remember the codes exactly but one was Evap leak (negative pressure) and i’m 99% sure it’s a little tube that connects to the fuel filler neck but i’ve been putting it off because it’s going to be a pain to replace lol. The other one was “Catalyst system efficiency below threshold” which i think has to do with my 02 sensor IIRC. Could an 02 sensor cause this problem? Link to comment Share on other sites More sharing options...
02_Pathy Posted November 19, 2018 Share Posted November 19, 2018 (edited) On 11/17/2018 at 12:38 PM, joshrichard said: I see, thank you. I ran the codes and I don’t remember the codes exactly but one was Evap leak (negative pressure) and i’m 99% sure it’s a little tube that connects to the fuel filler neck but i’ve been putting it off because it’s going to be a pain to replace lol. The other one was “Catalyst system efficiency below threshold” which i think has to do with my 02 sensor IIRC. Could an 02 sensor cause this problem? When my 02 sensors were bad mine started up just fine besides throwing the check engine light. They're really just for emissions, shouldn't cause your truck to start like that. I'm going to say it's something else Edited November 19, 2018 by 02_Pathy 1 Link to comment Share on other sites More sharing options...
joshrichard Posted November 19, 2018 Author Share Posted November 19, 2018 When my 02 sensors were bad mine started up just fine besides throwing the check engine light. They're really just for emissions, shouldn't cause your truck to start like that. I'm going to say it's your altI checked my alt and it’s working just fine Link to comment Share on other sites More sharing options...
02_Pathy Posted November 19, 2018 Share Posted November 19, 2018 2 minutes ago, joshrichard said: I checked my alt and it’s working just fine I didn't mean to say alt, I tried changing it but I guess it didn't work lol. Try cleaning your MAF sensor and potentially that EVAP leak could cause issues with the computer saying somethings wrong so it's trying to adjust to that 1 Link to comment Share on other sites More sharing options...
joshrichard Posted November 20, 2018 Author Share Posted November 20, 2018 I didn't mean to say alt, I tried changing it but I guess it didn't work lol. Try cleaning your MAF sensor and potentially that EVAP leak could cause issues with the computer saying somethings wrong so it's trying to adjust to that It was the MAF Sensor, running too rich and fouled all the plugs. The throttle body needs cleaning as well. Going to get on that tomorrow hopefully, because I have a lot of Thanksgiving cleaning to do today 1 Link to comment Share on other sites More sharing options...
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