being in Minnesota has nothing to with or not needing cooling head mod. your car still gets to operating temp. sounds like a the start of number 8 cyl.overheating. its not just marauders, mustangs all over have the issue
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
SOLD 12/31/2021
Cobra short block / ProCharger F1-A / Cog drive upgrade / Manley valves / Brian Tooley Racing valve springs / 80# inj. / -8 fuel line / -6 return / Aeromotive 340 pumps and regulator / 2012 GT500 TR6060 six speed / twin disc clutch / Driveshaft Shop GT500 upgraded CV joint shaft / BA5000 blow thru MAF/ 4.10's / Ford Racing 31 spline set up and Girdle / Metco D.S. safety loop / Stainless Works headers, cats, and everything else out back / ClassGlass hood / Bob's hood strut mod / Hurst line lock / Metco control arms / Addco front and rear sway bars / Monroe severe duty shocks all around / Race concepts rotors / Badgeless grille / 35% tint / FBM's interior LED kit and ambient lighting kit / Pioneer FB700 deck / kenwood speaker 4 Ch. / Rockford Fosgate 10" sub and amp / Kicker 6 X 8's all around / back up cam / bluetooth / Pioneer Xm / 704 RWHP 603 RWTQ tuned by Mo's Speedshop.
Does this sound like a cylinder is loosing compression? I was in 2nd gear about 35 mph. Foot hard on the brake and the go pedal to the floor. The RPM starts climbing then at about 4000 RPM, boom, it runs rough like on 7 cylinders.
Compression doesn't just suddenly get lost at 4000 RPM.
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
It comes on so quick. I could be in 2nd gear at 5000 rpm at half throttle and there it runs great. Then give it a little more throttle and it starts running rough. Is it possible I have a bad injector? Or a bad TPS?
Ford IDS can do a cylinder balance test. It's an electronic equivalent of a compression test
The twins2.3 whipple/aluminatorVortech V-2 lots of goodies
Current marauders
04 DTR totaled JUST NOW starting to part out 7-21-2021 https://youtu.be/REUxjP1BVpg
04 Silver Birch Dark Charcoal Hardtop Whipple Supercharger
04 Silver Birch Dark Charcoal Hardtop V2 Supercharger
04 Silver Birch Dark Charcoal Converted
03 DBP Light Flint #122
03 DBP Dark Charcoal #232
03 Silver Birch 300b Light Flint Going to fix er up
03 Black 300a
04 Silver Birch Dark Charcoal moonroof in the works
04 Heaton Swapped DTR
Joe's Wrecked DTR rebuild thread
So if it is the head(s), what are my options? Sounds like heads are hard to come by. Does anyone like MMR sell our heads? Does anyone rebuild them?
I did a cold compression test today. Pulled the fuse on the fuel pump. Ran the started for about 3-4 seconds. Got between 175 and 180 psi on each cylinder.
Took it out for a drive then did a hot test on #6. Even though I pulled the fuse on the fuel pump, it still tried to fire. I got about 150 psi on #6. I did it three times shutting off just before it tried to fire.
Seems weird I'd get a lower number when hot. Or is it because it tried to fire?
I'm going to try replacing an injector. I've never done this. Could I get some advise / help on how to do this?
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