1994 olds 98 3.8 l. I have changed tps.crank sensor. Egr valve ,maf sensor.ecm. When the cel is off i have no passing gear but have cruiseconrol, but when the cel comes on i have no cruise but passn

You could have a few problems but it's also possible that you only have one problem. Suggestions: > Check your EGR Valve (Electronic Gas Recirculation Valve), >Check your MAFS (Mass Air Flow Sensor), >Check for excess carbon build-up within your Throttle Body, >Check your TPS (Throttle Position Sensor). As mentioned earlier; you may have only one problem but it wouldn't hurt to service all avenues while you are at it, after all the car is 30 years old and so I would also like to mention that it would also be a good time to add a NEW O2 Sensor unless you had one replaced not too long ago.

hi, I use to have the same problem I had to change engine electrical wires, then I had to change the crank sensor and the module ( destributer ) first let him check the complete wires installation then if they are good let him change the crank sensor

And what fault codes prompted you to replace these parts you listed? You never mention fuel pressure readings under a load, how about excessive exhaust system back pressure? Has the transmission been scanned for fault codes?

It is possible that you could have a bad spark plug wire, or a bad coil pack. Also it could be your TPS Throttle positioning sensor. Check spark on each wire to verify that you are infact getting spark the whole way across. If you are then I would suggest changing the TPS as it is inexpensive, if that does not help it could be your MAF, ( Mass Aif Flow Sensor) Hope that helps

This is code 12 and it means "System Normal"
Here is the complete list of fault codes for your Buick
GM common codes for OBD1 (for vehicles made before 1995)
12 System normal
13 oxygen sensor circuit open
14 coolant sensor high resistance or shorted
15 coolant sensor circuit low or open
16 direct ignition system (DIS) fault in circuit
17 cam position sensor fault
18 crank or cam sensor error
19 crank sensor circuit fault
21 tps sensor out of range
22 tps sensor signal voltage low
23 intake air temp sensor out of range, low
24 vehicle speed (vss) sensor circuit fault
25 air temp sensor sensor out of range, high
26 quad-driver module (computer) circuit #1 fault
27 quad-driver module (computer) 2nd gear circuit
28 quad-driver module (computer) circuit #2 fault
29 quad driver module (computer) 4th gear circuit
31 cam position sensor fault
32 egr circuit fault
33 map sensor signal out of range, high
34 map sensor signal out of range, low
35 idle air control sensor circuit fault
36 ignition system circuit error
38 brake input circuit fault
39 clutch input circuit fault
41 cam sensor circuit fault, igntion control circuit fault
42 electronic spark timing (EST) circuit grounded
43 knock sensor
or electronic spark control circuit fault
44 oxygen sensor lean exhaust
45 oxygen sensor rich exhaust
46 pass-key II circuit or ps.pressure switch circuit fault
47 pcm-bcm data circuit
48 misfire diagnosis
51 calibration error, mem-cal, ecm or eeprom failure
52 engine oil temperature circuit, low temperature indicated
53 battery voltage error or egr or pass-key II circuit
54 egr system failure or fuel pump circuit low voltage
55 a/d converter error or pcm not grounded or lean fuel or frounded reference voltage
56 quad-driver module #2 circuit
57 boost control problem
58 vehicle anti-theft system fuel enable circuit
61 a/c system performance or degraded oxygen sensor signal
62 engine oil temperature high temperature indicated
63 oxygen sensor right side circuit open or map sensor out of range
64 oxygen sensor right side lean exhaust indicated
65 oxygen sensor right side rich exhaust indicated
66 a/c pressure sensor circuit low pressure
67 a/c pressure sensor circuit or a/c clutch circuit failure
68 a/c compressor relay circuit failure
69 a/c clutch circuit head pressure high
70 a/c refrigerant pressure circuit high
71 a/c evaporator temperature sensor circuit low
72 gear selector switch circuit
73 a/c evaporator temperature circuit high
75 digital egr #1 solenoid error
76 digital egr #2 solenoid error
77 digital egr #3 solenoid error
79 vehicle speed sensor (vss) circuit signal high
80 vehicle speed sensor (vss) circuit signal low
81 brake input circuit fault
82 ignition control (IC) 3X signal error
85 prom error
86 analog/digital ecm error
87 eeprom error
99 power management

Bad COP Ignition Coils--ANY CODES?

Change front 2- O2 Sensors at 100,000 miles

Clean MAF Sensor -with CRC MAF Cleaner

Fuel Filter-every 3 years

Check--TPS Sensor -values -with an oscilloscope

MASS AIR FLOW CAN CAUSE PROBLEMS IF ITS DIRTY OR SKEWED .YOUR IDLE AIR INLET PASSAGES OR THROTTLE BORE IS DIRTY OR FULL OF DEPOSITS.BESURE REPLACE EGR VALVE GASKET THE OLD GASKET WILL LEAK.CHECK FOR THROTTLE PLATE THROTTLE SHAFT OR LINKAGE IS DAMAGED OR STICKING.

It sounds like a fuel pump. Check the fuel pressure. What size engine?

massair frow sensor

You should have your battery checked, it may be getting old and doesn;t have as much cold cranking power, I don;t think code 32 has anything to do with the slow cranking when cold.


Trouble Code 32 indicates that the Exhaust Gas Recirculation (EGR) valve diaphragm is not where the ECM expects it to be. The ECM controls the diaphragm with a Pulse-Width Modulated (PWM) waveform. The EGR has a vacuum bleed solenoid that adjusts the vacuum applied to the EGR valve based on this pulse width. If there is sufficient vacuum at the EGR valve, a switch closes to send a signal back to the ECM. The absence of this signal is the bases for code 32.
The conditions for setting this code are:

• no vacuum to EGR (switch open), and
• Code 33 or 34 (MAF error) is not present, and
• engine running and LV8 is less than 100, and
• coolant temperature is > 118 deg F (48 deg C), and
• the EGR solenoid duty cycle is < 65%, and
• the above conditions are met for more than 25 seconds

Typical causes for this code include:
1) Faulty EGR valve-to-ECM connection
2) Plugged EGR passages and/or sticking EGR valve
3) Defective EGR valve
4) Defective ECM