North American Turbocoupe Organization



86 wont start/backfires
86rustybird Offline
Junior Member
#1
hi guys, been on the site since 2001 when i bought my car, coulnt remember user name and password. anyways, my car has been sitting for bout 6 months, went to start it other then battery dead it started and ran fine. ran for 5 mins or so then i plugged the radio back in, it worked still ran fine. then i hooked up my air/fuel gauge to the o2 sensor. it ran fine for nother min or two then it died. now it wont start, and the radio wont turn on. i unplugged the air/fuel gauge and the radio, still no start. it turns over fine, its getting fuel. it is almost backfiring, sounds like its trying to start but not firing right. ive checked the timing belt and its turning fine, as well as the rotor inside the dissy. just last year i changed the timing belt tensoner, dizzy and the tfi. if i had to guess id say its timing related but i dont know how anything would have changed. only other idea is something electrical but not sure where to start. sorry for the long post but trying to get everything in there, thanks in advance for all the help
Reply

TurboBoost88 Offline
Member
#2
where did you tap into the engine wiring harness for your air /fuel gauge ? sounds like you might have a wiring problem, since everything was fine until you removed the gauge.
88 TurboCoupe,Midnight Metallic Blue on Blue cloth, 140 m.p.h. speedo, 96,000 miles, 5spd. Gills valve, many new parts waiting to be installed..88 TC, Silver, 5spd, My first car, wish I still had that one! Built for customers: 67 Ford Fairlane,69 Mach I,70 Mach I Clone,95 Ranger 2.3/5.0 EFI Conversion,99 Cobra Procharger SC-1 Install/Tune,Factory Five Racing Mark III Cobra #4114,1955 Black on Black Thunderbird for local Ford Dealer owner's wife.
Reply

Dave8338 Offline
Senior Member
#3
Sounds to me like the timing belt jumped a tooth or two.
Have you pullet the cover and checked to see that the timing marks are lined up and that the rotor is pointing to the correct bolt head?
'86 TC: Granatelli adjustible clutch kit, Energy Suspensions, they own me, New KYB's, NOS heater core in the back seat, Chuck Warren Motor Mounts, Wallbro 255, Kirban FPR, New aluminum dual core. The Goal...all I need is the TIME!!
Reply

86rustybird Offline
Junior Member
#4
i spliced right into the wire as it comes out of the 02 sensor. im going out now to check if the timing marks line up. i dont know why it would have jumped, its a new belt new tensioner and i wasnt revving it or anything when it died.
Reply

Not B Anymore Offline
Administrator
#5
Any chance you forgot to tighten up the tensioner bolt? (I have...)
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
Reply

86rustybird Offline
Junior Member
#6
just checked. when the upper marker is lined up to the middle mark, the bottom mark on the crank is one or two marks above tdc. does this mean it jumped a tooth or two? and yes the bolts were tight i just checked them
Reply

86rustybird Offline
Junior Member
#7
update. i redid the cam timing and it still wouldnt start. so i pulled the dizzy. about 4 gears of the dizzy gear are broke off. what could cause this, should i look for any other problems before i put a new dizzy in it?
Reply

Not B Anymore Offline
Administrator
#8
There are several theories as to why this happens. Mismatched dizzy/aux. shaft gears, modern oils with low Zinc content, not enough oil flow to the gears, etc.

To fix it, and be confident that it will stay fixed, you will need to drop the oil pan and clean out all the bits and pieces that are now in there. You're also going to need a new auxiliary shaft. I wrote a big long post about it when I went through this. It may give you a good idea of what you're in for. See below:

http://natomessageboard.com/ubbthreads.p...Post241609
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
Reply

Pete D Offline
Administrator
#9
Not cleaning the pieces out of the engine is not an option. Failure to do it well will result in the same thing happening again. There are lots of past post about this repeating cycle.
Pete Dunham


Reply

86rustybird Offline
Junior Member
#10
where do i find an axu shaft?
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB