exhaust, missing, problem

289 · 09-30-2003, 11:53 AM

I have a few questions, first I was told that I could not put 2.5 on exhaust on my 89 GT from the mufflers back. Also is there a 2.5in exhaust (tailpipes) premade by like flowmaster or Mac. Second I put a timing light on my car and I was watching the mark on the crank I reved the engine and the mark didn't seem to move much. I thought the timing should really advance when under a load. this might lead to my final prob The car runs bad when the air outside is cool it will miss and hesitate under no load situation, but when I hit the gass all is well.
Thanks for the help

stang_racer20 · 09-30-2003, 12:23 PM

2.5" exhaust will easilt fit

billheis · 10-01-2003, 12:04 PM

When you rev up the engine at idle there is no load on it and the timing will not move very much. Itsnot like the old mechanical advance units that moved with rpm. You mention that its worse when cold, possiblity of coolant sensor or ACT sensor. Check your codes.

09-30-2003, 11:53 AM	#1
289 Registered Member Join Date: Jan 2000 Location: Mount Joy, PA , U.S. Posts: 198	exhaust, missing, problem I have a few questions, first I was told that I could not put 2.5 on exhaust on my 89 GT from the mufflers back. Also is there a 2.5in exhaust (tailpipes) premade by like flowmaster or Mac. Second I put a timing light on my car and I was watching the mark on the crank I reved the engine and the mark didn't seem to move much. I thought the timing should really advance when under a load. this might lead to my final prob The car runs bad when the air outside is cool it will miss and hesitate under no load situation, but when I hit the gass all is well. Thanks for the help

09-30-2003, 12:23 PM	#2
stang_racer20 Registered Member Join Date: Jun 2003 Location: Wisconsin Posts: 348	2.5" exhaust will easilt fit __________________ 92 Mustang GT, 347 Stroker(Forged Steel Crank/Rods-Balanced, Forged Aluminum Dished Pistons), Trick Flow Track Heat Intake, Trick Flow Twisted Wedge Heads w/ Stage 3 port/polish, 80mm C&L MAF, FMS 30# Inj., BBK AFPR, Trick Flow Stage 2 Cam, Trick Flow 1.6R Rockers, BBK E.L. Headers, Flowmaster Cat-Back, MAC CAI, FMS Pulleys, Griffin Alum. Radiator, MSD Pro-Billet Distributor; AOD, Dynamic 3300 Lockup Converter, B & M Super Cooler, B&M Ratchet Shifter; 3:73 gears.

10-01-2003, 12:04 PM	#3
billheis Registered Member Join Date: May 2001 Location: Fernandina Beach, FL 32034 Posts: 178	When you rev up the engine at idle there is no load on it and the timing will not move very much. Itsnot like the old mechanical advance units that moved with rpm. You mention that its worse when cold, possiblity of coolant sensor or ACT sensor. Check your codes. __________________ Bill Heiser 90 Convertable 5.0 LX, ported E7s w/ THumper valve job, TFS street, FR 65mm TB, B cam w/1.7 cobra rockers, kirban AFPR, Mac CAI, Mac Headers, off road h, 3 chamber flows, Crane ign. box, 3:73s, Art Carr AOD & 2600 converter

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