bigsexyred321 Posted December 30, 2007 Report Share Posted December 30, 2007 Ok when i first start out driving my car drives fine but after I drive about 4 or 5 mile, then that is when the problems starts. If I let off the gas I have to pump the gas several times to make the car keep going and if I dont pump the gas like that then the car will cut off. What do you think the problem could be. 93 Cadillac Seville STS 4.6 Northstar engine front wheel Drive Link to comment Share on other sites More sharing options...
MAC Posted December 30, 2007 Report Share Posted December 30, 2007 Check for trouble codes first. To enter diagnostic mode: 1. Turn ignition "ON." (Don't have to start) 2. Depress the "OFF" and "WARMER" buttons on the Climate Control Center (CCC) simultaneously and hold until the segment check appears (about 4-5 seconds) on the Instrument Panel Cluster (IPC). Here's a link to find out what codes mean. Diagnostic Trouble Codes Link to comment Share on other sites More sharing options...
growe3 Posted December 30, 2007 Report Share Posted December 30, 2007 An important thing to do before trying to diagnose these cars, is to be sure that they are getting full battery flow. I recommend cleaning the battery terminals and cable ends, as a good starting point. Cleaning Battery Terminals: ( Use a tooth brush size brass cleaning brush, and a small flow of plain water, to clean parts.) 1. IMPORTANT, disconnect the Negative battery cable first; this lessens the chance for a short circuit, when using a wrench on the Positive terminal. Position the Negative Cable away from the battery. 2. Locate where the Negative Cable attaches to the engine block. Unbolt the cable end, and remove the Negative Cable. Using plain water and the brush, scrub both ends clean to bright metal. Scrub, or sand, engine attachment point, to bright metal. Reattach Negative Cable tightly to the engine block 3. Scrub the Negative Battery Terminal clean, to bright metal. 4. Disconnect the Positive cable. Position the cable away from the battery. 5. Scrub the Positive Battery Terminal clean, to bright metal. 6. Separate the Positive Cable double terminal, and scrub all four sides to bright clean metal, and then reassemble the double terminal. 7. Scrub clean, or replace, both terminal bolts. 8. Reconnect the Positive Cable to the battery. 9. Reconnect the Negative Cable to the battery. 10. Verify that the battery cables are clear of, and will not touch any rotating engine parts. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
growe3 Posted December 30, 2007 Report Share Posted December 30, 2007 Can you supply more information about your car? Mileage? Any recent repairs you may have made? Any other problems? This helps track down the trouble spots. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
bigsexyred321 Posted January 3, 2008 Author Report Share Posted January 3, 2008 Mileage? almost at 200k Any recent repairs you may have made? installed front oxygen sensor, fuel pressure regulator Link to comment Share on other sites More sharing options...
bigsexyred321 Posted January 15, 2008 Author Report Share Posted January 15, 2008 P042 current Front O2 sensor signal Lean P046 Front to Rear Bank Fueling Difference These are the two codes that I get when I do the onboard Diagnostics Link to comment Share on other sites More sharing options...
Ranger Posted January 15, 2008 Report Share Posted January 15, 2008 Look for a vacuum leak. Link to comment Share on other sites More sharing options...
navion Posted January 15, 2008 Report Share Posted January 15, 2008 Vacuum leak or dirty throttle body, or both. Britt Britt Link to comment Share on other sites More sharing options...
PAUL T Posted January 15, 2008 Report Share Posted January 15, 2008 Look for a vacuum leak. Follow the vacuum lines from the top of the throttle body and follow them around between the engine and firewall. Also when you changed the FPR did you check the seal around the intake manifold cover? This will cause a vacuum leak and the P046. You might check to see if there is a short in the wiring to the O2 sensor that would cause the P042. Link to comment Share on other sites More sharing options...
bigsexyred321 Posted January 31, 2008 Author Report Share Posted January 31, 2008 I finally bought another O2 sensor and both the P042 and P046 code went away. Link to comment Share on other sites More sharing options...
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