I have asked this question before, however the best way to get a post is to ask again!
I have a 1999 neon, used to be encredible on gas, lately in the past 6 months its been horrid, --400km-- per tank, I have tried everything that came to mind, new plugs, new plug wires, new PCvalve and hoses, fluid treatments,new air filter, injector treatments (even manually cleaned them) Tire pressure is fine, Cat converter is fine, im thinkin its a sensor?
I plugged the EGR valve vaccume hose SHUT and that also made no difference. The car feels like theres loss in power as im trying to accellerate ANY IDEAS!?
2006-10-31 17:23:35 · 5 answers · asked by thell666 1 in Cars & Transportation ➔ Car Makes ➔ Dodge
They didn't use DOHC engines after 98 in the Neons (US).
You may need some oxygen sensors, they do not last forever. Most of the time they are neglected until something goes wrong with them. They are maintenance items, I just can't remember when they are recommended to be replaced (around 80-100K miles usually).
If you have done the regular maintenance and are still wondering why your milage is not as good as it was before. Consider the following.
Clean out the throttle body. Some carb cleaner and a rag - wouldn't hurt. You could have a bunch of carbon in there gumming things up!
How many miles are on the car? Sounds like timing belt time. If your Neon is reaching the 100,000 mile mark, or has reached it without the timing belt being replaced, it is time to do it. I have worked on several Neons (own a 2000 w/116K Miles) and over time the stretching (wearing) of the timing belt does effect things like idle quality, fuel mileage, and sometimes responsiveness. While the timing belt is getting replaced I recommend replacing the water pump while you are in there.
Another thing that may be hurting your mileage is the transmission, if it is an automatic. Have it serviced, (fluid and filter, NO FLUSH) and the bands adjusted. These too, over time wear and loosen up a little causing slippage. In most cases a band adjustment can tighten them right up. Tighter shifts mean less slippage, hence better mileage.
Good luck with you Neon. I like mine, it has been a great car. I plan on keeping it even after purchasing a new vehicle!
2006-10-31 23:23:23 · answer #1 · answered by konstipashen 5 · 0⤊ 0⤋
99 Dodge Neon
2016-09-28 00:37:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Did you change the Oxygen Sensor(s)? because these sensors can cause you to have poor gas mileage. You can also save yourself some time and have the vehicle tested at a dealership with a diagnostic computer (costs around $60 to $80 usually) but call your local Dodge dealership and ask for the price.
Hope I helped you out.
2006-10-31 17:45:16 · answer #3 · answered by dazedreamr 4 · 0⤊ 0⤋
When you changed yer plugs, did you happen to notice any oil above the threads? On these DOHC's the sparkplugs are recessed in tubes, sometimes the sealant leaks.The factory uses a hardening sealant.I've seen enuff oil in the tubes to ruin the plug wires. If this is yer problem just clean the tubes, wipe sealant area with acetone, apply a l'il #2 permatex & pound'em back in.Also, replace wires. Good Luck
2006-10-31 20:04:03 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It may be something as simple as a dragging brake caliper. Drive the car around for a few minutes being careful not to overuse the brakes. Stop and feel each wheel. If one is hotter then the others, you have a dragging brake caliper
2006-11-01 01:40:23 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Sounds like your oxygen sensor is bad. When it begins to fail, it will cause your engine's air/fuel ratio to be rich, which will reduce your MPG and make it sluggish, which is exactly what you have described.
2006-10-31 17:42:24 · answer #6 · answered by pelked1 1 · 0⤊ 0⤋