help

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wicked02

New Member

Jan 27, 2011

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Jan 29, 2011

#1

• Jan 29, 2011

• #1

i need help bad. i have a 02 gt everything was running good. Got up one morning and it surges from 45 mph to 55 mph. replaced the air filter and fuel filter and check for vac leaks. don't know what else to do

 

trombonedemon

Well-Known Member

Jun 25, 2009

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U.S.A, U.S.A., U.S.A.!

Jan 30, 2011

#2

• Jan 30, 2011

• #2

When you mean surge in rpm's or mph's? Miles per hour could mean your throttle is sticking.

 

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wicked02

New Member

Jan 27, 2011

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Jan 31, 2011

#3

• Jan 31, 2011

• #3

like it's skipping, but not it's not bringing up the light or not giving the code

 

03_TrueBlue_GT

Active Member

May 5, 2010

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Houston, Tx

Jan 31, 2011

#4

• Jan 31, 2011

• #4

Well you can take your air filter off and check to see how dirty it is and if it is nasty go ahead and replace it. Then go and check your throttle body and check for carbon deposites on the throttle if there is a large build up of carbon on it go ahead and clean it with some throttle body cleaner spray. Also while your at it check to see if your fuel cable linkage has slack in it for any freeplay.
You could also check your IAC for any irregularities... Thats about all I can think of, also what grade of fuel are you using and is it fresh or old gas?

 

trinity_gt

10 Year Member

Jan 31, 2003

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Canada

Jan 31, 2011

#5

• Jan 31, 2011

• #5

FWIW, I advise against cleaning the TB in any way. There are coatings present intended to help the throttle plate seal so the IAC can do its job properly. Just leave it be...it's not the source of the problem.

You say the MIL isn't coming on but it sounds like you've got a misfire. Did you actually scan the car for codes with a scan tool?

What are the mods on the car?

Was the car re-fueled before this started? Any chance you've got water in the gas?

 

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wicked02

New Member

Jan 27, 2011

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Feb 3, 2011

#6

• Feb 3, 2011

• #6

i scan the car but no codes. i only run 93 octane and so far it just has a cold air intake for now. whatever it is it's getting worse just bought a set of coils and plugs going to change them.any other suggestions all are appreciated

 

mrvax

Stay thirsty my friends

Founding Member

Nov 29, 1999

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SN Moderator: Orlando, Fl.

Feb 3, 2011

#7

• Feb 3, 2011

• #7

wicked02 said:

i scan the car but no codes. i only run 93 octane and so far it just has a cold air intake for now. whatever it is it's getting worse just bought a set of coils and plugs going to change them.any other suggestions all are appreciated

Click to expand...

No need for 93 octane unless you have a power adder or higher compression than factory. Your car will run best on regular. (I doubt this will fix your problem but it will save you some money.)

 

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wicked02

New Member

Jan 27, 2011

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Feb 4, 2011

#8

• Feb 4, 2011

• #8

i just replaced all the coils and still does it. i am pulling my hair out

 

midnightdriver

Active Member

Jan 3, 2010

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Northern California

Feb 4, 2011

#9

• Feb 4, 2011

• #9

wicked02 said:

like it's skipping, but not it's not bringing up the light or not giving the code

Click to expand...

Skipping or slipping? If you have an auto I suggest taking a look at if you have low trans fluid and what color the trans fluid is. Sounds like slipping clutch packs if the speed surges like that or TC locking/unlocking.

 

mrvax

Stay thirsty my friends

Founding Member

Nov 29, 1999

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SN Moderator: Orlando, Fl.

Feb 5, 2011

#10

• Feb 5, 2011

• #10

It may be time to take the car in. From your description, it could be a bad MAF to a bad fuel pump. Find a good shop to run some tests so you don't end up pissing away good money replacing everything.

 

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wicked02

New Member

Jan 27, 2011

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Feb 5, 2011

#11

• Feb 5, 2011

• #11

midnightdriver said:

Skipping or slipping? If you have an auto I suggest taking a look at if you have low trans fluid and what color the trans fluid is. Sounds like slipping clutch packs if the speed surges like that or TC locking/unlocking.

Click to expand...

no,it's a manual trans. i am going to try some stuff before i take it in to dealer. i am just furious that i can;t figure it out