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Unread 11-10-2008, 06:26 AM   #1
emtjoaquin
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check engine light blinking

Hello All ,

This morning when my check engine light came on ( flashing ) breifly . It felt like I had no pick up or it did not want to engage if you will . When I got to the next stop light it was gone . I've kept up on everything , no leaks nothing . This happened once before but I had put a can of 44k in it . Any thoughts ...Thanks .

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Unread 11-10-2008, 10:14 AM   #2
PhulesAu
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Abondon your vehicle, that is the self destruct warning.



Check FAQ's for the trick to checking engine codes. Hopefully it will be one that shows up.
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Unread 11-10-2008, 10:24 AM   #3
itasor
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Flashing is usually misfires. Stop at an auto parts store and see if you can read the code.
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Unread 11-10-2008, 10:32 AM   #4
Zew
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x2 on that. You'll have a p300 multiple misfire code and possibly p301, 302, 303, 304, 305, 306 all depending on which cylinders are misfiring.
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Unread 11-10-2008, 11:03 AM   #5
DixiesCJ3B
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Yes a blinking check engine light is a misfire, i would take it to someone, and get the codes pulled, autozone and advance auto will do it for free
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This "Jeep thing" is like dating a really really hot chick, who is crazy! Its alot of fun, you spend too much money, your up all night ending up sweaty & greasy from it, your friends are jealous, you get admission into some sort of weird club... but it gets mad at your for no reason, throws fits seemingly randomly, has unexplained issues which it somehow solves on its own only after you try a bunch of different things (and spend a bunch of money) to solve it... and yet you can't resist getting in it every chance you can.
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Unread 11-10-2008, 02:54 PM   #6
emtjoaquin
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Being that is still under warranty I took it to , the dare I say " Dealership " . The manual says " CATOSTROPHIC " failure if the light is blinking . Is this true ? The service advisor says it could be a lot of things . Also will they be able to read the codes even it the light is not on . When I drove it to the shop it did fine ???
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Unread 11-10-2008, 03:01 PM   #7
Sccafire
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Quote:
Originally Posted by emtjoaquin View Post
Being that is still under warranty I took it to , the dare I say " Dealership " . The manual says " CATOSTROPHIC " failure if the light is blinking . Is this true ? The service advisor says it could be a lot of things . Also will they be able to read the codes even it the light is not on . When I drove it to the shop it did fine ???
yes it can be bad if you drive it with the CEL blinking all the time. Yes they can can check the codes if the light is not on.
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Unread 11-10-2008, 04:10 PM   #8
jake1977
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What I have learned is when your CEL is on and solid you need to have it looked at within a reasonable time. If it is flashing you need to get it looked at immediately. Rule goes first it is on solid then it will flash if urgent.
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Unread 11-10-2008, 04:12 PM   #9
jeep rio
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Quote:
Originally Posted by emtjoaquin View Post
Hello All ,

This morning when my check engine light came on ( flashing ) breifly . It felt like I had no pick up or it did not want to engage if you will . When I got to the next stop light it was gone . I've kept up on everything , no leaks nothing . This happened once before but I had put a can of 44k in it . Any thoughts ...Thanks .
usually a flashing ses code on obd2 means a misfire or some other major malfunction. Stop driving the vehicle untill you can get it scanned and find out what the issue is other wise you can create additional issues.
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Unread 11-10-2008, 04:20 PM   #10
DixiesCJ3B
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Yea when the light is blinking, try not to accelerate fast or slow down quickly, just drive very nicely if you have to, im not sure about jeeps but my old trucks manual said that you could damage your cat if your drove quickly and things of that nature
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1999 TJ Wrangler, 4 banger 5-spd
Soft-top, full doors
31" BFG AT, 3" Lift

1954 CJ3B Willys
Hurricane 4, 3-spd with Warn Overdrive, Snow-plow

NGJC# 15
Low Output 4 cylinder Jeep Club Member #166
Build Thread
Are You An Offroad Junkie
Quote:
Originally Posted by MysticGringo View Post
This "Jeep thing" is like dating a really really hot chick, who is crazy! Its alot of fun, you spend too much money, your up all night ending up sweaty & greasy from it, your friends are jealous, you get admission into some sort of weird club... but it gets mad at your for no reason, throws fits seemingly randomly, has unexplained issues which it somehow solves on its own only after you try a bunch of different things (and spend a bunch of money) to solve it... and yet you can't resist getting in it every chance you can.
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Unread 11-10-2008, 06:33 PM   #11
jeep rio
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Quote:
Originally Posted by Zew View Post
x2 on that. You'll have a p300 multiple misfire code and possibly p301, 302, 303, 304, 305, 306 all depending on which cylinders are misfiring.
If it is P0300 it usually means vacuum leak! Not all the time but most of the time.
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1997 XJ Sport 2 Door- High country suspension and skid plate package.
2006 TJ- Custom lift 4in Full traction springs, OME shocks, Kilby skid plates and bumper, Full traction 3 link in rear, JKS control arms upper lower, Banks exhaust, Edge trail jammer, 4.56's and true trac front, Eaton elocker rear. D30, D44

1995 YJ Rio Grande- 4.0l Swap 3.5 in 4wd hardware lift, Ford 8.8 Rear 4.10 gears.
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Unread 11-11-2008, 03:19 AM   #12
gotmule
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I had the same problem w/my '01. If you turn your ignition on and off 3 times in succession, leaving it on the 3rd time the codes will flash on the odometer. I got 2 cylinder misfires...replaced my plugs whose electrodes were worn to nubs and it runs like new...156k. I did not realize how much power I had lost.

Jerry
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Unread 11-11-2008, 11:55 AM   #13
emtjoaquin
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Turns out to be two o2 sensors . There are being replaced . Thanks for everyones help !
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Unread 12-22-2008, 07:20 PM   #14
chubbena
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My check engine light flashed and engine ran rough on my way back home. Diid a little search here and found it was the 6th cylinder misfiring. Changing all spark plugs in the dark in freezing weather wasn't fun but it's running smooth now. Thanks to the forum and friends here.
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Unread 06-10-2009, 09:14 PM   #15
ProjectWhiteTJ
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weird i have tried all these things and i still have a p0300 or p030-. i am at a lost for what to try next. the only thing i can think of is the crankshaft position sensor.
any help?
thanks
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