Parts need to change to preform a tune-up

https://video.search.yahoo.com/search/video?fr=mcafee&p=1998+oldsmobile+intrigue+water+replacement+video&type=E210US1494G0#id=2&vid=31be44c276a1b2c75eac99254416f24b&action=click

This should help.

not sure what you mean by how to tune. just change the plugs, plug wires, fuel filter, air filter if needed. this is the usual tune. the good shops will clean the throttle body/plate as well.

sounds like you might have a short inside the electrical part of the ignition switch.

Best to run it to autozone let them scan it with their scanner to tell you which plug is misfiring the will do this free. and it will tell you exactly what is the troubled cylinder.Remember to rate my solution this is how i earn my achievements also testimonial Thanks much in advance.

You will need a scan tool.

First clear the codes, than run the car until it misfires, than see what the new code says.

go to this site and they have owners manuals for all kinds of cars you can print them for free

http://www.ownersmanualsource.com/

98 oldsmobile intrigue:
http://www.ownersmanualsource.com/oldsmobile/oldsmobile-intrigue-owners-manuals/

7 qrts a total flush u need 12

it is under the glove compartment

It is located on the back wall right under the alternator and idle pulley! hope this helps and you will need a funnel!

the easyist thing to do is to take it to a local garage. it cost me $120 for the part i needed and installation. and it was done in an hour