20 Most Recent 1998 GMC Sonoma - Page 9 Questions & Answers

The Cam Sensor is located in the distributor under the rotor cap. And the The crankshaft position sensor is located on the left side of the engine block. -------- This will help.Thanks.Helpmech.

Sounds like it might be caused by low fuel pressure to the injectors. Maybe the fuel filter needs to be replaced. If that doesn't help, then it might also be the electric fuel pump in the gas tank.

follow top radiator hose backe to engine it will be at the end

It could very well be the seal. You need to try to see if you can pinpoint the leak. Being that it is a 98, I would say the seal is wore. I had the same problem in a S-10 I had. Went to the junk yard and got the whole piece. They are not that hard to change. It could be the hose leaking, so try to retrace everything. More then likely, a seal goes before the hose. Check all endings. If you have anymore questions, feel free to contact us. We are here to help in anyway we can. Thank you very much for choosing FixYa.

I hope you have found the fuel filter by now, but if not....look up under the bed, on the passenger side. It should be about halfway between the seat and the rear wheel. There is also a "strainer" in the fuel tank itself.

Hope this helps!

A VERY COMMON CAUSE OF THAT IS THE ENGINE COOLANT TEMPERATURE SENSOR, YOU WILL NEED TO VERIFY PROPER OPERATION WITH A LIVE DATA SCANNER, BEFORE U TURN IT ON IN MORNINGS OR COLD, COLD ENGINE LOOK FOR CTS READING IT MAY READ -40 DEGREES, IF SO THEN SENSOR IS MALFUNCTIONING, BUT WILL NOT SET A "SERVICE ENGINE SOON" LAMP WARNING. OTHER WAY TO CHECK IS TO DISCONNECT SENSOR, I AM ASSUMING THAT WEATHER IS ABOVE 20 DEGREES. LET ME KNOW IF THIS HELPS, CAN ASSIST YOU FURTHER WITH UPDATES

What's the question? Have the clutch replaced.

Go to Autozone auto parts and they will connect to the computer and read the code(s) for no fee.

check fuel pressure, I have had a similar issue and it turns out it did not have enough fuel pressure to start it on its own.

reply to me and tell me what size engine please and is it 2 wheel or 4 wheel drive?

I think that it is not a vacuum hose
most all trans went electric shift in 1995
if the hose is coming from the tran check and see if it goes to the top of the tran
and it will go from rubber line to metal tube
I think your looking at the tran vent
and does not hook to the motor
get back to me if that's what it is
leave some feedback
good luck

Chances are your thermostat is stuck open.
Try changing it and maybe have the coolant system flushed.
Good Luck!

didnt say if its 4 wheel drive what size motor.

It is at the very top rear of the engine behind the intake to the right of the distributor on a thin lip of metal of the engine block.

My 98 sonoma would not start if humid and about 70F. There was also no fire when acting up. Finally found a bad connection on the hall pickup sensor from the distributor. I put ox-guard on the connector pins and plugged it back in - no problems. Took about 2 years and $500 in wasted repairs to find this. Good Luck!

no That has a dual contact base and you need a single contact base like a 1156 or 89

Check the fuel pressure regulator. Pull the vac line after it is warm and see if it is leaking gas into the vac line.

sounds like your mass air flow sensor may be bad

Hello! To avoid spending money on parts that are not bad, I'll need to eliminate a few common failure areas...The main code we need to look at is the P0102...The Mass Air Flow (MAF) sensor sits in between the air cleaner outlet and the Throttle Body Inlet...disconnect its connector and remove it...carefully clean it with rubbing alcohol in a spray bottle...air dry...Check the throttle body inlet for carbon build up...clean with throttle body cleaner if necessary...Install MAF and reconnect...Replace the PCV valve...

Do not start the engine...Bolted to the throttle body is the Manifold Absolute Pressure (MAP) sensor...It has a three wire connector...wire colors are...Light green...Gray...And Black...Using two safety pins...Push one pin into the rear of the in-place connector into the Light Green wire and the other into the Black wire...Set the meter to read 5 volts...Connect the + meter probe to the Light Green and the - probe to the Black...Turn the key to the ON position...Meter should read 4 volts...If it does not the MAP sensor is defective...

Once we can establish that the MAF, and throttle body inlet are clean... PCV and the MAP are functioning...and there is still a problem I will narrow down to a component...Please include any and all information about the vehicle's state of tune...Guru...saailer I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867