99 TL-code 1399 (random/multiple cylinder misfire)

Old 02-25-2019, 10:30 PM
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99 TL-code 1399 (random/multiple cylinder misfire)

My cars CEL just came on this morning when I left to wrk. Lucky I had my obdII reader in the trunk and was only a cpl blocks frm my home. Plugged her in and code 1399 came up w no secondary code(s). Iíve tried scanning the forums here but havenít seen it or havenít looked hard enough lol. My guess is a bad spark plug or valve clearance/adjustment 🤞🏼
Not too sure what my first/cheapest step should be to fixing the issue and hoping someone here can help me out 🙏🏼
Appreciate any and all feedback 😁
Thank You in advance 😉 ✌🏼
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Old 02-26-2019, 11:06 AM
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I went to the top of the 2g forum and searched for "p1399" and found that a lot of solutions for this problem involved inspecting & cleaning the EGR system. followed up by spark plugs, and then coils.

It should take about 5-10 minutes to remove the intake manifold cover and inspect the throttle body passages. if your car's throttle body appears to have clogged EGR ports/passages, that might be all that's needed.

P1399 related threads:

EGR cleaning: I wouldn't do it on the car the way this guy did...take the whole thing off and clean it out well. There are other DIY's here in the forum, had a hard time looking for them, but that's probably because I haven't had coffee yet today.

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Old 02-26-2019, 02:31 PM
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Thanks for feedback whitetiger5 👍🏼 👍🏼 looks like a busy evening after wrk haha hope the rain holds off ☔️ 🙏🏼
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