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Old 02-28-2013, 02:48 PM   #1
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mustang problem

What can be the cause of my mustang gt problem? While in park it accelerates good but once i dri e it it wont accelerate and it shakes i already checked it top to bottom but cant seam to find the issue of my gt's problem any advise..
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Old 02-28-2013, 03:08 PM   #2
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You have checked all vacuum lines?

---------- Post added at 02:08 PM ---------- Previous post was at 02:07 PM ----------

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Old 02-28-2013, 04:22 PM   #3
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What can be the cause of my mustang gt problem? While in park it accelerates good but once i dri e it it wont accelerate and it shakes i already checked it top to bottom but cant seam to find the issue of my gt's problem any advise..
So in other words when under load it boggs down and misses? What kind of fuel you use? Whats done to the car? What did you check?
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Old 02-28-2013, 06:16 PM   #4
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Sounds like a air /fuel / timing issue!
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Old 03-01-2013, 10:48 AM   #5
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Check for a vacuum leak, and double check the timing.
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Old 03-01-2013, 08:12 PM   #6
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Sounds like a air /fuel / timing issue!
That's pretty much everything for it to run. Lol
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Old 03-01-2013, 08:13 PM   #7
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Check for a vacuum leak, and double check the timing.
+1, if none are found I would look into replacing the fuel filter, and checking your ignition system. You may just need a tune up if it hasn't been done recently.
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Old 03-02-2013, 07:10 PM   #8
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+1, if none are found I would look into replacing the fuel filter, and checking your ignition system. You may just need a tune up if it hasn't been done recently.
+1 cap, rotor, plugs, wires, oil, coolant, air filter, fuel filter, vac lines is a good place to start. ONLY replace these if they are old and need replacing. Dont throw parts at the problem.

I had a similar problem. My first advice check your timing and wire routing.
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Old 03-03-2013, 11:44 PM   #9
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What can be the cause of my mustang gt problem? While in park it accelerates good but once i dri e it it wont accelerate and it shakes i already checked it top to bottom but cant seam to find the issue of my gt's problem any advise..
I had the same problem just recently I replayed my fuel filter and my EGR valve but I couldn't seem to find the problem then I did new spark plugs so then I night new wires and one of my wires on the top cap wasn't on right so that was my problem and now I finally got it after so long it runs good again! You might want to check that![COLOR="Silver"]
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Old 03-09-2013, 11:19 PM   #10
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Yes. Ive checked all vac Lines its wierd the problem started right when i replaced the stock fuel pump to a 155.
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Old 03-09-2013, 11:22 PM   #11
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Might've got a bad fuel pump
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Old 03-09-2013, 11:27 PM   #12
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What i did i cleaned the fuel lines ordered some new injectors cuz the ones it had were nasty. Installed some new accel wires sparkplugs, fuel filter and now i just have to wait for the inj. To arrive and install them..

---------- Post added at 11:27 PM ---------- Previous post was at 11:24 PM ----------

Thats what i had tought too but i dropped the fuel tank took the fuel pump out and checked it out and it worked great and the pressure looked good..
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