Car turns over but won't start

Asked by Oct 30, 2016 at 06:00 PM about the 2003 Buick Regal LS

Question type: Maintenance & Repair

Hopefully someone can help me out here. I have a 2003 buick regal ls 3.8l motor 204k . Recent work done New plugs and wires new coils, new front and back valve cover gaskets new fuel filter and fuel pump , new MAF sensor, Both 02 sensors, New PCM ( still have old one and it's apparently good because it didn't solve the po340 code problem. I left work one night and the car stalled out and would crank over but not start. Of course the battery died but I have been using my buick lesabre to jump it.  I had it checked out by a mechanic and he checked the following and they were working, plugs got spark, fuel pump was strong, coils fine naturally, battery was good. The car ran great before this happened the gas pedal seemed a bit tighter that afternoon so I immediately thought the fuel filter or pump which he tested 1st and both were fine

The other day I went out to try to start it again and it wouldn't start so I hooked up my code reader and both the p0340 and p0650 codes that were there before don't show up anymore but then again it only scans for about 15 seconds and it's done. I bought the PCM on ebay and it was programmed to my vin#, my key fob worked right from the start and it ran somewhat fine for a month then this happened . Anyone have any suggestions? I keep thinking I should put the old PCM back in any thoughts on that? i'm thinking maybe something is wrong with it.

2 Answers

6,255

Spray some quick start in the throttle body and see if it starts for a bit, if it does, check fuel pressure, if pressure is above 35psi, check pulses at the fuel injectors

2 out of 2 people think this is helpful.
63,075

If you have spark and fuel (Quick Start) and it still won't run, do a compression test. If all cylinders test very low or zero it's jumped timing. HTH. -Jim

Your Answer

Add photo

Related Questions

  • Car Won't start 2 answers

    I was driving home and my 2002 Buick regal and the traction control light, the abs light, and service vehicle light came on. So I pulled over and turned off my car then tried to turn it back on and...

    2002 Buick Regal LS

    -

    Maintenance & Repair

  • Car won't start just clicks once 1 answer

    I have a 2002 Buick regal ls, when I try to start it, it just clicks once, the lights on dashboard go off and headlights too, as soon as I let go everything comes back on, headlights are bright ag...

    2002 Buick Regal LS

    -

    Maintenance & Repair

  • Starting Problem 2 answers

    Car won't start. Turn key to start and Nothing. There's a new starter, neautraul safety switch. The key is the one with that little chip deal in it. If You jump starter it will run for a Second an...

    1995 Buick Regal 4 Dr Gran Sport Sedan

    -

    Maintenance & Repair

  • I held my locks down on my 200 buick Regak to adjust the lock setting and now my car won't start. What should I do? 12 answers

    2000 Buick Regal GS

    -

    Maintenance & Repair

  • Car won't start 1 answer

    What could be causing my car (engine) to not turn over at all?

    Buick LeSabre

    -

    Maintenance & Repair

Search Buick Regal Questions

Buick Regal Experts

#1 Tom Demyan
Tom Demyan
Reputation 380
#1 FordNut
FordNut
Reputation 380
#3 dvigano
dvigano
Reputation 360
View All

Related Models For Sale

Used Chevrolet Impala
588 Great Deals out of 29,014 listings starting at $1,300
Used Chevrolet Malibu
794 Great Deals out of 88,771 listings starting at $1,900
Used Honda Accord
718 Great Deals out of 83,073 listings starting at $500
Used Chevrolet Camaro
137 Great Deals out of 35,623 listings starting at $1,995
Used Cadillac CTS
234 Great Deals out of 11,727 listings starting at $1,599
Used Ford Mustang
329 Great Deals out of 45,942 listings starting at $2,000
Used Nissan Maxima
270 Great Deals out of 26,145 listings starting at $2,545
Used Chevrolet Monte Carlo
8 Great Deals out of 1,402 listings starting at $2,500

Used Cars For Sale

2017 Buick Regal For Sale
10 Great Deals out of 5,688 listings starting at $17,888
2016 Buick Regal For Sale
21 Great Deals out of 1,515 listings starting at $15,550
2015 Buick Regal For Sale
9 Great Deals out of 464 listings starting at $12,900
2014 Buick Regal For Sale
21 Great Deals out of 722 listings starting at $11,989
2013 Buick Regal For Sale
13 Great Deals out of 498 listings starting at $10,908