8 88STANGMAN New Member Oct 4, 2004 4 0 0 Aug 4, 2005 #1 Aug 4, 2005 #1 Help i have noticed what sounds like valve rattle when the engine is under a load and RPMs are above 3500. The car is a 1988 GT 5.0. It has just had a tune up also.
Help i have noticed what sounds like valve rattle when the engine is under a load and RPMs are above 3500. The car is a 1988 GT 5.0. It has just had a tune up also.
stang22 Active Member Jan 29, 2003 1,318 7 38 Washington, D.C. Aug 4, 2005 #2 Aug 4, 2005 #2 Is it pinging or detonating? What do you have your timing set to? Tim
8 88STANGMAN New Member Oct 4, 2004 4 0 0 Aug 4, 2005 #3 Aug 4, 2005 #3 Sounds like detonation-just bought the car so i havent checked the timing yet. Just seems to do it under load. Also backfires some going up hills.
Sounds like detonation-just bought the car so i havent checked the timing yet. Just seems to do it under load. Also backfires some going up hills.
stang22 Active Member Jan 29, 2003 1,318 7 38 Washington, D.C. Aug 4, 2005 #4 Aug 4, 2005 #4 If it does it under load, that could be a sign on detonation. What type of fuel have you been using? Double check your timing as well. If you are not sure how to do it, here is a little write-up I did to help out. http://www.leemotorsports.com/stang22/timing2.htm
If it does it under load, that could be a sign on detonation. What type of fuel have you been using? Double check your timing as well. If you are not sure how to do it, here is a little write-up I did to help out. http://www.leemotorsports.com/stang22/timing2.htm