North American Turbocoupe Organization



More stupid bird tricks (Timing?)
**PathogeN** Offline
Member
#1
I was drivin my bird around the other night (was running perfectly) and all of a sudden (i just downshifted to come to a stop) it started to run really bad...like it does when I blow up an intercooler hose or something. I limped home (still went like 40 but not easily) and figured it was a hose. Well it wasn't and I could find nothing wrong at all. I then guessed, well maybe the timing skipped or something. So I line up the cam mark and sure enough, TDC. I then start the car and it runs fine. (All i did was turn the crank around). Today, it did the same thing again (runnin bad) but this time when I got on it from a stop. And sure enough, turning the crank around fixed it again. Any ideas? Is something loose that I'm tightning when i turn it or what?
88 Turbo Coupe (White)
88 Psudo Coupe (Silver LX)
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Pete D Offline
Administrator
#2
Sounds like the cam timing belt is jumping at higher stress levels like fast starts and downshifts. Either you need a new belt or maybe also a new belt tensioner.

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88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS.
Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges. New engine shortly, ported head and
manifolds, polished and cc'd chambers, A-230 cam, Race Engineering Adj Cam Sprocket, Crowlers, ARP head studs, Walbro 190 pump and T-3 for starters. KB subs
and jack rails.
Pete Dunham


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**PathogeN** Offline
Member
#3
Thanks. The belt appeared to be a bit loose. I have a nice ets tensioner laying around here so I guess now's a good time to put it on. How much play is "OK"? The belt now appears to be pretty loose....i can push it back about 1/4 inch or so. Probably way too much.
88 Turbo Coupe (White)
88 Psudo Coupe (Silver LX)
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Pete D Offline
Administrator
#4
One of my tensioners likes to hang up when "released" to reapply tension. I use a crowbar to give it a little nudge. It can only go so far so you don't need to put a lot of force on it.

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88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS.
Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges. New engine shortly, ported head and
manifolds, polished and cc'd chambers, A-230 cam, Race Engineering Adj Cam Sprocket, Crowlers, ARP head studs, Walbro 190 pump and T-3 for starters. KB subs
and jack rails.
Pete Dunham


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