Question about 1992 GMC Sonoma

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Will an OBD scanner tell me if the timing chain is stretched allowing my vehicle to jump time?

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Yeah! That is what OBD2 Scanner works.

Posted on Dec 21, 2011

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No it will not because the chain is a machanical part only way to check is to remove it and to compair.maybe the tensioner is broken.

Posted on May 21, 2011

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2 Answers

Why does my timing chain keep jumping time.i have set the timing three times


If it is a chain. Check the shear pin/moon key on the crank shaft.

Nov 08, 2015 | Cars & Trucks

1 Answer

Getting p0016 code


Crankshaft Position - Camshaft Position Correlation
What does this mean? OBD Code P0016refers to
The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work in harmony to control the spark/fuel delivery and timing. They both consist of a reluctor, or tone, ring which passes over a magnetic sensor, which generates a voltage, indicating position. The crankshaft sensor is part of the primary ignition system and functions as the "trigger". It detects the position of the crankshaft relays that information on to the PCM or the ignition module (depending on the vehicle) to control spark timing. The Camshaft position sensor detects the position of the camshafts and relays the information to the PCM. The PCM uses the CMP signal to identify the beginning of the injector sequence. What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this P0016 code will set.
Symptoms Possible sumptoms of OBD code P0016
Malfunction Indicator Lamp (MIL) illumination The engine may run but with reduced performance The engine may crank but not start The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged The engine may start and run, but poorly
Causes Possible causes of OBD code P0016
Timing chain stretched, or timing belt skipped a tooth due to wear Misalignment of timing belt/chain Tone ring on crankshaft slipped/broken Tone ring on camshaft slipped/broken Bad crank sensor Bad cam sensor Damaged wiring to crank/cam sensor Timing belt/chain tensioner damaged
Possible Solutions First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

Nov 05, 2015 | 2010 Jaguar XF

1 Answer

Struggle to pick up speed, jerks and jumps


With the milage your vehicle has , I would assume the timing chain is stretched. To check timing chain, take off the distributor cap, turn engine by hand clockwise till the distributor rotor begins turning. When you stop turning it start to turn back the opposite direction while watching the rotor, there should be no delay between the time you start to turn engine,and the time the rotor begins to turn. If there is any delay, then the timing chain needs to be replaced.

Mar 17, 2014 | Chevrolet Astro Cars & Trucks

1 Answer

Is there a way to check the timing chain without removing the cover ( this is quite a job) for a look at the timing marks


no way of doing so. need to remove cover. i have been doing this since 1996 and have never seen chain driven nissan jump timing. have seen some timing belt cars jump, but never chain driven engines. i think you have something else going on. i have done many and many timing chain jobs on frontiers and maximas, but not for a timing chain jumping issue. upper timing chain shoes wear out and engine gets noisy. i have to say i have seen some with the primary chain stretched a bit, but car still ran fine.

Sep 12, 2012 | 2005 Nissan Frontier

1 Answer

What happens when ur car jumps timing and what causes it?


A car with a timing belt will jump time for several reasons, the belt dries out and the teeth strip off the belt, the tensioner or guide wear and fail, the belt can stretch over the years causing it to jump the sprockets. A car with a timing chain can jump because many were made with cam gears that had plastic teeth and they wore out, or the gear was made out of a casting that wore out, or the chain stretched replacement cam gears were usually made out of steel. Bob Bristol Magic Collision


Performance Chip

May 24, 2012 | 1991 Buick Regal

1 Answer

I replaced the camshaft position sensor P0340, now the OBD is reading a PO0016


Causes that bring up code P0016 may include:
  • Timing chain stretched, or timing belt skipped a tooth due to wear
  • Misalignment of timing belt/chain
  • Tone ring on crankshaft slipped/broken
  • Tone ring on camshaft slipped/broken
  • Bad crank sensor
  • Bad cam sensor
  • Damaged wiring to crank/cam sensor
  • Timing belt/chain tensioner damaged
  1. First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck.
  2. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor.
  3. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.
Hope this helps

Feb 06, 2012 | 2005 Chrysler PT Cruiser

1 Answer

The chain jumped the gears. I opened the case and it looked pretty clean. the chain appeared stretched. I bought another chain and installed. It lasted about 3 weeks and it stretched agian and jumped the...


u may need 2 replace the timing gears as well old gears may have worn teeth.i had same prblem with a chev mtr fitted a chain&gear set fixed it right up. ps make sure u use a new chain

Sep 10, 2011 | GMC Denali Cars & Trucks

2 Answers

Does my 2001 town car have a timing chain or a


The 4.6 Liter SOHC Ford engine is equipped with two timing chains. One chain drives the right side camshaft and the other chain drives the left side camshaft

May 12, 2010 | 2001 Lincoln Town Car

1 Answer

How often (Mileage) do I change timing belt on


chains are not like belts.... they are much tougher therefore last a hell of a lot longer...typically around 90,000 miles or more they should be looked at as they do eventually stretch and can jump time...they also have tensioners that can wear out causing the chain to jump a tooth, and a tell tale sign of this wear is indicated by noise coming from the timing chain case area.I have seen some 3.8 v/6 engines one in particular manufactured by Buick/Olds and installed in early CJ 5 Jeeps lasting over 200,000 miles...but sounding like a washing machine at idle from all the worn parts as well as some having a fiber type cam sprocket that wears out(used to help silence any gear slap noise)Hope this somewhat helps.

May 06, 2010 | 1999 Chevrolet Lumina

2 Answers

Do timimg chains need to be replaced (not a belt)?


Timing chains do need to be replaced but they can typically go much longer between being serviced than can timing belts. The chain will stretch out over time and can 'jump' timing. If you have an interference engine then that can prove disastrous as the piston can crash into the valves.

Its not terribly common for a timing chain to jump timing but not impossible. I have a vehicle with nearly 120k with a timing chain and its never been replaced and is still in good shape, I have another vehicle with 170k also with a timing chain that has never been replaced.

If it were me and I was going to be doing some work in that area and had easy enough access to the timing chain, and the mileage was getting up there, I would replace it. Timing chains typically also have a tensioner, so if you replace it, dont forget this item.

Dec 31, 2008 | 2006 Toyota Corolla

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