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2003 turbo bug trouble codes? how do I find them on the car and internet? Do I need to buy a scan tool? The thing started missing really bad, like a maf sensor or vacuum leak, it's not drivable, don't want to tow it.

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If you are not able to drive the car then buying an OBDII scanner will be the only way to get the codes. If you have a Autzone/Kragen near by you can drive to them and have them pull the codes. This website has a really good writeup on how to trouble shoot a engine misfire at home. Following this guide you can troubleshoot the misfire without a scanner tool. You can also reference this writeup for misfires.

Posted on Mar 12, 2011


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03 trailblazer will not fully turn over and run. I can get it to start for a few seconds by pumping pedal but missed out really bad and then shuts down with service engine light on

Could be a lot of different things have someone take you to AutoZone or similar and either purchase a obd scanner worth the price. You can even maybe use the loner tool program and borrow one. Take it home and scan vehicle for codes this will give you a idea what is wrong.

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Code reader says 1-3-5 is missing but I know 1&5 is firing jERRY b

Intermittent misses can be caused by bad coils, dirty fuel injectors, and bad o2 sensors, to name a few.

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2003 grand marquis engine skip or miss under light acceleration at all speeds . No codes show . New plugs and filters .Idle smooth , good at hard acceleration . 6o k

Do not need codes to have problems

There could be codes, but only Enhanced Codes,
that a Generic Code Reader can not get

That is why I consider a free code read at parts
store a waste of time

If you own one fine,your using the internet,learning
as you go & trying to do your own work,that is okey

But the real data you need,is on a scan tool & doing
a road test with it

Only professional tools will allow you to
look at the required data, to hopefully find
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Many things can cause a cylinder misfire

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Trouble code p1605

which engine option, we need that first. ?????????
2.4, 3.7L manual or automatic.???????????
1605, seems to be missing in my list. is this an autozoned, tool check? this code is bogus. typed wrong or not using a real scan tool that can read P1 Jeep FACTORY codes or correctly. (many cant)

the answer is in 2 places.
1: the FSM.
2: and training on how to fix cars. called diagnosis.

read here.

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1 Answer

1,3,5,7 cylinder miss fire

Bank1 failure.

my guess, those DTCs off a cheap scan tool>? why not post source and real codes, no lie P0301 is real. but off what?

real engine: Name.

4.7 L 2UZ-FE V8

VVT-i variant??? got VVT? IF ONE SIDE FAILS, misfire there. if cam retarded. if bad, can be 14deg retarded, (huge)

see cam action here.

2003 Tundra.

if using a full real scan tool that sees all toyota extended DTCs , you might see VVT errors, $20 tools and lame autozoned , blind .

there are 4 sensors there, id bet there are codes you missed!

P0301,3,5, and 7, DTC, ONLY?

bad coil packs? no.

thats the whole left bank, bad.

RF 2-4-6-8

LF 1-3-5-7

so, VVT bad on left bank or coil pack ,

yours has 8 COP coils, so its not 4 bad COPS.

a real mech sees all this in 1 second , online, impossible

nor country. sold.\'

could the timing belt slip only on one side

did you do timing belt service, on time, if not, bingo.

misfire is

bad compression (vvt?)

bad spark , no, not all 4

bad fueling, but there is only 1 maf/map, and one full injection rate there so not fuel mix.related.

here is a tool (most AZ stores clueless)

that reads the enhanced DTC of Toyotas

using a 1996 tool , misses the boat.

but id bet your VVT is bad. left bank.

the real tool might help. here.


P0011 Diagnostic Trouble Code Discussion for
Camshaft 1 Position Sensor Target Performance
P0012 << or this>? P0020/21/22?

the FSM shows the manual tests for these VVT parts.

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what code is the trouble light giving--have car scanned some auto stores such as auto zone / advanced auto scan for free the trouble code will give u a place to start

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Service Engine Soon light - 2003 Pontiac Grand Am

The loose gas cap is a quick and easy check to perform, so try that first. The service engine light will remain on until the next "cold" start.
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1 Answer

Mil light on

Needs to be plugged in to a diagnostic code reader. It is telling you that the engine has recieved a signal it is unhappy with. the trouble code will tell you where abouts the problem is.

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1 Answer


Some how you are getting a massive voltage surge that is frying the coils. Could be a bad ground, the coils get charged up then you lose ground and the coils can’t discharge their load so they burn out. You’re probably gonna need someone really proficient with a scan tool to trace this problem down. At $500 a pop for all new coils I’d definitely give some serious consideration to taking it to the dealer or even good auto electric shop. At the very least you need to find someone with a scan tool to pull the codes and see if there are any trouble codes listed in the computer.

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