Go Back   Ford Mustang Forums > Mustang > 4.6 Mustang > 4.6L Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.


Reply   Post New Thread
Unread 12-10-2012   #1 (permalink)
lavega21 is offline Rookie


Joined: Nov 2012
Posts: 5 Threads: 3
 lavega21's Country Flag
Newbury Park   California
lavega21 is on a distinguished road
Default Gasoline smell on my oil 1996 GT

This my situation…had my 96 GT garaged for about two years. I now have the need for this car to become my daily commuter. All I did was charge the battery and the car started like nothing. I did smell some gasoline smell coming from the engine, but could not see any leaks or anything I took it to smog failed so I changed oil, spark plugs, oil filter, air filter and then as soon as I turn the engine on looks like a cylinder one misfired based on the check engine code. That engine code was not there before.

I took it to the smog station again and it failed again with almost exactly results. I did reset the check engine code and after driving the car for 750 miles it has not appeared again. I do notice that it is creating more steam from the exhaust, more than normal I have never seen it this way before. It goes away eventually but I have never seen it that much before. The low oil came on which before It never did, I checked the oil and I smell gasoline a little, I mean I just changed the oil about 750 miles ago and it is low….could all this be connected with the misfiring of the cylinder? What about the air filter I know I had to remove the Air Flow Thing, Maybe I did something wrong with that? Any ideas? Thank you….See my other thread for feedback on the overall issues I am having with this car. Thank you.

177K Original Original - Mainly in town drive 20-25 miles daily.


Other thread on this car
lavega21 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 12-10-2012   #2 (permalink)
SoCal2V is offline SHELBY GT 350 Member

Classic Member
4.6L Member


Joined: Sep 2010
Posts: 6,141 Threads: 16
 SoCal2V's Country Flag
Hell
SoCal2V is on a distinguished road
Default

Likely bad news here, in the form of bad compression.

Try the Dollar Bill test- Start the engine, remove the oil fill cap, and hold a bill of your favorite denomination over the fill spout. Does it blow up and away from the fill spout, or is there a light amount of suction holding the bill in place?

If it blows up and away, this would be a strong indication of bad compression via compression rings on the piston. Follow up with a compression test and cylinder leakdown test on any poorly performing cylinders. When you perform the compression test, when you get a low reading at a particular cylinder, the quick and easy way to diagnose the lack of compression being due to a bad ring is to put about a teaspoon amount of motor oil into the cylinder and then repeat the compression test at that location. If you get better numbers with the oil in the cylinder, it would more or less confirm the lack of compression is due to the piston ring. If it stays pretty much the same, a leakdown test will confirm if it's a valve and which one in particular.

What's happening essentially is the unburnt air/fuel mixture in the combustion chamber is escaping into the crankcase on the compression stroke, aka 'blowby'. That would be why you smell gasoline in the oil and also explain the oil consumption you're experiencing.
__________________

2001 GT Convertible

All the usual bolt-ons
1967 Coupe
200 I6, C4
SoCal2V is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 12-10-2012   #3 (permalink)
lavega21 is offline Rookie


Joined: Nov 2012
Posts: 5 Threads: 3
 lavega21's Country Flag
Newbury Park   California
lavega21 is on a distinguished road
Default

As always, thank you for your reply...I will try that, but my thing is that nothing like this was happening before so what did I do to cause this? All the four things I did are pretty much routine tune up changes. Did I do something to cause this? Possibly?
lavega21 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172