Question about 1994 Chevrolet C1500

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I need to set timeing back 12 deg.so say smog. are

I need to set timeing back 12 deg.so say smog. is timeing on crank .can u uae reg, timeing light? thank-u walt

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  • walter stagg Sep 25, 2009

    thank u very much.its what need.
    thank u, walt

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Okay the timing mark is on the crank and the degrees are on the timing chain cover. you will need to have the truck warmed up and the timing connector disconnected. that connector is inside the cab , passanger side near the heater box and blower motor. where the firewall and carpet meet it is a single coonector and the wire is tan with black strip. you have to have that disconnected so the computer goes into base timing and don't advance. you can use a reg, timing light. and this is all assuming it is a 1994 chevy 1500... let me know if you need any more help. good luck

Posted on Sep 25, 2009

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Can you giving me year make and model and motor size please and i will guide you through the process

Posted on Sep 25, 2009

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1 Answer

How is ignition timing regulated? Car gets 99 BTDC on ignition timing and failed SMOG Test in CA. Listed as GROSS POLLUTER.


something wrong here
with 99 degrees btdc it will not run
have you got it on the correct plug lead
next the timing is regulated by centrifugal advance if electronic or points and by the crankshaft position sensor if ECM controlled ( some after market distributors that are used in place of points units have a small sensor in the distributor that can adjust the timing according to engine rpms, but it cannot make allowances for mixture and so they can advance the timing but not take into account anything else which sometimes results in detonation under certain throttle settings
so initial setting for most cars is 10-12 degrees btdc at idle and with engine rpms set up to 3000 rms it may advance to 25-30 degrees depending on the advance mechanisms
with ECM units the timing is controlled by the crank position sensor and is set to parameters according to engine rpms and air/fuel ratio settings but it still has a basic 10-12 degrees btdc on starting
to fail smog tests you probably do not have a working cat converter and other problems besides timing

Sep 15, 2016 | Cars & Trucks

2 Answers

Passing smog


I doubt it as you have stated that it shows a calibration fault . This will be from the variable valve timing assembly on the cam shaft/s that is altering the valve timing. The timing chain may be faulty but you should be hearing it to be that bad.

Apr 03, 2014 | Volkswagen Jetta Cars & Trucks

1 Answer

1992 Chevrolet Tahoe timing


timing on the chevy motors do not very much.
most of the older 350's timing are set about 8 deg before top dead center. some california smog certified 350 timing were set back to 0 deg or, at top dead center. check under the hood for a smog decal. it should have the timing specs, or it might say "timing not adjustable" or N/A. if it is missing the decal i would set it at 8 deg, road drive it, and listen for enging pinging on accelerating under load. if no ping i would leave it at 8 deg,if there is slight pinging i would ****** the timing in 2 deg increments until the pining stops. i would stop if i reach reach 0 deg or top dead center.

Sep 12, 2012 | Cars & Trucks

1 Answer

Which line on the harmonic balancer do i use to line up with the timing plate?


The manufacturers ignition timing specification for a 1992 Chevrolet S-10 Blazer 4.3L V-6 (VIN CODES W and Z) is 0 Deg. at idle with the EST bypass connector unplugged. You do not have to worry about which line to use on the balancer. There will only be one of them that is even close to the pointer on the timing cover. When the line on the balancer is aligned with the mark on the timing cover with the timing light, you are done.

If you really think you REALLY need to know which line is which, then pull #1 spark plug out and using a screwdriver or a punch in the spark plug hole, rotate the engine slowly to find where top dead center is. When you find top dead center on the intake stroke, the line on the balancer that is aligned with the mark on the timing cover will be the one you want to use (the other line will not even be close on the intake stroke OR the power stroke.)

Now, if you have your engine modified or something, (I don't know why you are asking someone at a performance shop or why he is telling you 8 to12 Deg. BTDC) then what you need is a timing light equipped with an offset adjustment. You set the offset on the light where you want it (i,e. 10 Deg.), then you align the timing marks as you would for a "normal" engine. You do not need any other marks on the timing cover. (Which is why the manufacturer did not bother to supply them for you.)

Feb 29, 2012 | 1992 Chevrolet S-10 Blazer

1 Answer

Had a1997 corolla fail smog test cause technician couldn't read or find timing marks-- what to do?


if the line doesnt show with the timing light the crank is 180 D off tdc it can be a baer to change but should run fine any way.

Jan 13, 2012 | 1997 Toyota Corolla

1 Answer

Recently bought a 1983 Ford F-250 pickup.. It has ~68,000 miles and is in pretty good condition. We were told that up until 4 years ago the truck was in Colorado which explains why the body has little...


Didn't mention how it runs, but a backfire through the exhaust is almost always either timing related (including mechanical timing of the cam to crank) or a bad exhaust valve. Was the cam recently replaced? Were the heads off? Have you checked compression?

Dec 23, 2010 | 1983 Ford F 250

1 Answer

How to time up a ford fiesta 12.5 on a y reg for


(you need a set of timing tools to do this)you need to place timing pin in engine block located drivers side just above the sump you need to set pistons at tdc to do this turn crankshaft clockwise till the crank stops against the pin then you need to take off the rocker cover place cam setting bar in the end of camshfts you then need to loosen cam sprockets dont remove undo tensioner remove belt replace with new starting at crank anticlockwise tension up tighten cam sprockets remove bar and pins 2 rotations by hand to see if everything ok then start

Dec 13, 2009 | 2000 Ford Focus

2 Answers

Need to adjust the timing on my 98 mazda b-2500.


if your timing is out by 12 deg you are probably out a tooth in the belt. it won't run right till the valves are in proper time with the pistons. hope this helps mike

Jun 16, 2009 | 1998 Mazda B-Series

2 Answers

Timing belt alignment


A factory service manual would help, but I'm assuming that if you had one, you probably wouldn't be on this site.

To set the timing, you need to first perform the obvious: remove the accessory drive belts, cam pulley covers, and engine fan and hub. Next you'll need to rotate the engine by hand until the timing marks on the camshaft sprockets and crankshaft are aligned with their corresponding stationary marks. The 0 degree mark on the lower timing belt cover is the timing mark for the crankshaft pulley. There is a mark (small, vertical formed indentation) for the left camshaft pulley on the backing plate behind the pulley near the 1 o` clock position. The same mark exists for the right camshaft pulley only it is on the backing plate near the 8 o`clock position (making it difficult to see). With the crankshaft placed at the zero mark, you can observed where the timing discrepancy exists.

(TIP: Once the right camshaft timing is properly lined up, etch an additional mark on the pulley's face and the backing plate at the 12 o`clock position. This will make it easier to align the pulley for furture adjustments and repairs)

To set the timing correctly, move the crankshaft pulley to 12 deg. BTDC. Being careful to not disturb the position of the crankshaft once it has been moved to that position, remove the crankshaft pulley, lower timing belt cover, timing belt tensioner, and timing belt. Compress the timing belt tensioner and if the original ring pin isn't available to retain the tensioner a small allen wrench can be used to achieve the same results. Line up both camshaft marks and reinstall the timing belt and timing belt tensioner (do not remove the timing belt tensioner tool used to maintain the tensioner piston in a compressed position). When installing the timing belt, be sure to allow the least amount of slack to exisit between the left camshaft pulley and the crankshaft sprocket, but without moving the pulleys.

Next, remove the timing belt tensioner piston retention tool and mount the lower timing belt cover and crankshaft pulley (without fully installing them). Rotate the crankshaft pulley to the 0 deg. mark. If done correctly, moving the crankshaft pulley from 12 deg. BTDC to 0 deg. will remove all remaining slack from the timing belt assembly and the camshaft pulleys and crankshaft pulleys will be lined up with their corresponding marks. Once proper timing has been achieved, install all removed parts.

(Another TIP: I hope it's not necessary, but in case it is, I'll remind you that proper torque of all bolts are necessary as this is an all aluminum engine. Stripping out bolts holes due to over-tightening bolts occurs very easily and become very annoying to deal with [e.g. alternator belts not being able to be tightened completely and constantly squealing every few days, etc.])

Apr 26, 2009 | 1997 Isuzu Rodeo

2 Answers

Isuzu C223 timing


need a injector pump dial indicator to set up lift in pump (movement on dial indicator)0.05mm at correct timing mark on crank pulley 12 deg.
the above is an example for 4JB1 & 4JB1-TC
which are isuzu diesel engines

Apr 19, 2009 | 1988 Isuzu Trooper 2 Door

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