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Old 07-15-2013, 10:49 AM   #1
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1990 5.0 engine

Why does my 5.0 hesitate when I punch the gas... Mostly from a rolling start. Is it because it is older? How can I fix it?
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Old 07-15-2013, 02:06 PM   #2
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Your air/fuel could be off , or bad TPS
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Old 07-15-2013, 02:08 PM   #3
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Easy to fix

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

???
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Old 07-15-2013, 02:45 PM   #4
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Quote:
Originally Posted by 1990 View Post
Easy to fix

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

???
I'd bring it to your local speed shop and have them do it
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Old 07-15-2013, 05:56 PM   #5
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It could be many things man. First try a tune up ( plugs, wires, all filters,.cap and rotor, maybe coil). Then check timing. I would try that out before replacing sensors...that can get expensive fast. Do you have any mods? How bad of a stall are we talking here?
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Old 07-15-2013, 05:59 PM   #6
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Just about a second
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Old 07-15-2013, 11:09 PM   #7
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First make sure your mass air wire is clean. No fuzz or oily residue from a k&n filter. They (forgot who, gray can. I think crc) make a spray now to clean the sensor/wire. It works well and won't harm it.
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Old 07-15-2013, 11:14 PM   #8
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I've already looked at that it looks brand new
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Old 07-15-2013, 11:25 PM   #9
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Then start with the basics; tune up, timing, fuel filter, air filter, cap, rotor, dirty injectors...
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Old 07-16-2013, 02:25 PM   #10
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If you haven't done a full tune up, do a full tune up. Assuming you have the stock heads:

-Autolite 25 Spark Plugs
-FRPP wires
-FUEL FILTER
-Oil
-Trans and diff fluids
-Clean MAF sensor
-Air filter
-Cap/Rotor
-If you have access to 93 octane fill up with that and set timing to 14 degrees advanced
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