my car after engine warms up and driving around 30-40minutes begins to act like it wants to sputter. Tach needle wants to drop below 900rpm when at traffic light. Recently had tune-up/fuel injection/system cleaned.Throttle body/Throttle plate cleaned.Replaced spark plugs/pcv valve.Air filter/oil change.Funny thing, it passed the smog!Is it something electrical, like mag sensor,oxygen sensor-need computer diagnostic. What do you think??Maybe fuel pressure system like fuel pump? Help
 
Answer Ranks
This week's top 10
| 1 globalhelper | 6 FREDDY BLUE |
| 2 pushrod | 7 gearhead89 |
| 3 ziptie12 | 8 MVG |
| 4 wenyan | 9 ChevyASE |
| 5 ebans777 | 10 corvairart |