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First I'll ask, do all the dash lights come on when the ignition is turned on? If not, fix the ignition switch first, if they do come on then I'm afraid the stepper motors on your instrument cluster have gone haywire, there are several repair kits for these stepper motor malfunctions available pretty cheap
If voltage to fuel injectors but no ground, have to check ignition module. The purple wire with white tracer carries rpm signal from distributor to computer, engine cranking, dc pulse on that wire, if nothing, check ignition module. W/o rpm signal, the computer won't ground fuel injectors.
Macsry2k answer makes the the most trouble shooting sense. Problem is definitely electric. Since the alternator is where the RPM reading comes from, this is the best place to start. Good luck!
there is fuel system cut off. the ECM think that the rpm is higher than what it should be, have a scan data read to see if ECM read different rpm of rpm gauge. rpm reading come from ignition module and crank sensor
Have verified the injectors are energized and if the ignition coils are firing the spark plugs. Do your rpm indicator show the engine is turning and sending a signal to the rpm gauge.
Try getting the codes pulled at a car parts shop. Usually the computer will keep it in its history. It sounds like it is an ignition problem. If there is no stored code I would look at things in this order: spark plugs, ignition wires, distributor/coil. If none of these seem to be the problem you may have to take it to a shop. If it was just the start and idle problem I would say it is something with what I said but that high RPM thing seems strange.
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment NGEC0549 PREPARATION NGEC0549S01 1) Make sure that the following parts are in good order. I Battery I Ignition system I Engine oil and coolant levels I Fuses I ECM harness connector I Vacuum hoses I Air intake system (Oil filler cap, oil level gauge, etc.) I Fuel pressure I Engine compression I EGR valve operation (If so equipped) I Throttle valve I Evaporative emission system 2) On air conditioner equipped models, checks should be carried out while the air conditioner is OFF. 3) On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio, checks should be carried out while shift lever is in “N” position. 4) When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe. 5) Turn off headlamps, heater blower, rear defogger. 6) Keep front wheels pointed straight ahead. 7) Make the check after the cooling fan has stopped.
SEF976U 3. Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load. SEF977U 4. Perform diagnostic test mode II (Self-diagnostic results). Refer to EC-644. SEF217U OK or NG OK ' GO TO 2. NG ' 1. Repair or replace components as necessary. 2. GO TO 2. BASIC SERVICE PROCEDURE VG33E Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d) EC-616 2 CHECK IGNITION TIMING 1. Run engine at about 2,000 rpm for about 2 minutes under no-load. 2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed. SEF978U 3. Turn off engine and disconnect throttle position sensor harness connector. SEF975R 4. Start and rev engine (2,000 - 3,000 rpm) two or three times under no-load, then run at idle speed. 5. Check ignition timing with a timing light. SEF371S 15°±2° BTDC (in “P” or “N” position) OK or NG OK ' GO TO 4. NG ' GO TO 3. GI MA EM LC FE CL MT AT TF PD AX SU BR ST RS BT HA SC EL IDX BASIC SERVICE PROCEDURE VG33E Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d) EC-617 3 ADJUST IGNITION TIMING 1. Adjust ignition timing by turning distributor after loosening securing bolts. 2. Turn off engine and connect throttle position sensor harness connector to throttle position sensor. SEF972R ' GO TO 2. 4 CHECK BASE IDLE SPEED With CONSULT-II 1. Read idle speed in “DATA MONITOR” mode with CONSULT-II. PEF356V 700±50 rpm (in “P” or “N” position) Without CONSULT-II 1. Check idle speed. 700±50 rpm (in “P” or “N” position) OK or NG OK ' GO TO 6. NG ' GO TO 5.
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