Timing specification6°
NOTE: Timed at number 1 cylinder with Electronic Spark Timing (EST) connector (tan wire with black stripe) disconnected. The EST connecter is located in the engine compartment adjacent to the distributor.
CAUTION: Always check the underhood emissions label (if available). Specifications and procedures on the underhood emissions label supercede all others.
TIMING ADJUSTMENT PROCEDURE: See: Ignition Timing
1986 should be carburatored and it is not required. That would only apply to a fuel injected engine.
A 1979 Chevrolet pickup does not have a timing belt, it has a timing chain. The chain will last the life of the engine and is normally replaced during an engine overhaul.
If it is the VORTEC engine then it is bolted to the passenger side of the timing cover on the front bottom side of the engine. If it is the TBI / THROTTLE BODY INJECTION engine then it don't have 1.
Need to know what type (Brand) of vehicle , Also what size engine 4.0L 3.8L Etc. Also is it carborated or fuel injected.
wich engine do you have?
yes
A throttle position sensor (TPS) is a sensor used to monitor the position of the throttle in an internal combustion engine. The sensor is usually located on the butterfly spindle so that it can directly monitor the position of the butterfly throttle valve. The sensor is usually a potentiometer and therefore provides a variable resistance dependent upon the position of the butterfly valve (and hence throttle position). The sensor signal is used by the Engine Control Unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems).
Outside the engine
There are three marks to line up... before you remove the lower timing belt cover there are the marks on the little gauge that is integrated into the cover that line up with a mark on the main crankshaft pulley (to actually time it while the engine is running) there are also marks on the camshaft sprocket (big sprocket at the top of the engine seen with the upper timing cover removed), that lines up with a white mark on the upper rear plastic timing cover. And finally if you replace the timing belt there is a mark on the crankshaft sprocket that lines up with a mark cast in the face of the aluminum engine block. mnemonic76 1988 Pickup owner
By measuring the amount of oxygen in the exhaust, the engine computer controls the amount and timing of fuel injected into the engine to maximise power and economy while minimizing emissions.By measuring the amount of oxygen in the exhaust, the engine computer controls the amount and timing of fuel injected into the engine to maximise power and economy while minimizing emissions.
Over loaded engine, excessive fuel injected, injection timing improper,
On the fuel injected engines, the computer acts as a governor. The transmissions up till the 1996 also had a mechanical shift timing governor.