1 Answer. SOURCE: 2004 kia optima lx, engine will turn over but will not start. The fuel line is connected to fuel injector Rail by 2 nuts (10mm) (from your right) next to air hose to air filter. Disconnect fuel line and start engine to see whether gas shoots out of the line. If not, fuel pump is broken. However, the 3.8-liter V6 used in Wrangler models and a couple others has been a sore spot. Jeep engine problems with this V6 have been due to connecting rod bearings and engine oil consumption. The fix is an engine replacement. Kia Engine Problems. The Kia Optima, Sorento, Forte, Sportage, and others share the same powertrain as Hyundai models. 3) VR30DDTT 3.0 V6 Fuel Injector Failures. Fuel injector failures are another one of the most common problems on the Nissan VR30DDT 3.0 V6 engine. There is also a service bulletin addressing fuel injector failures. Some attribute this to mods, tunes, and running E85 fuel blends. May 12, 2022 at 11:33. Across the country, Ford Bronco owners are reporting that their SUVs are dying. The issue seems to only affect those with the 2.7-liter V6 engine but instead of a simple fix 2005 Kia Sportage v6 Runs ok for a few seconds after battery is connected, then bogs down. Codes PO300, 301, 303, 650. New spark plugs did not fix the problem.. Cam and crank position sensors were rep … read more Dear NHTSA, I have a 2006 Kia Sportage with 69,245 miles and have been in the dealer on 12/4/14, 12/8/2014, 12/13/14, for engine shutting off while braking to enter another lane or to turn. The 2.7 liter Ecoboost engine is a great engine, but it has its fair share of problems. The most common issues are carbon build-up, excessive oil consumption, and spark plugs and ignition coils. The first problem that many owners of this engine have is carbon build-up on the valves and pistons. This causes the engine to run rough, misfire, and The K2700 with the 2.7-litre engine has to make do without a turbocharger and as such produces 62 kW and 168 Nm torque with a power peak at 4150 RPM. This engine is said to return a combined cycle fuel consumption of 10.7 l/100km. The smaller of the two engines, the 2.5-litre turbodiesel, produces more and comes in at 96 kW and 255 Nm - all gOzODE.