Neon2003

Car runs OK on level roads. Power loss uphill with max rpm 3k with pedal to floor.
Manual 5-spd with 73k miles. Started 2 weeks ago with two tank refills. No CEL codes. I replaced spark plugs (normal) and air filter. Gave it to the dealer thinking it was clogged cat.
Dealer verified following is good: cat, fuel pressure 58 psi with good flow, timing, injectors, verified back pressure, check for clogged muffler (good), compression good, no vacuum leaks
- replaced O2 sensor - showed rich mixture
- drained gas tank, cleaned fuel lines and injectors
No improvement.
Suggestions welcomed.

TVLynn

Have you checked the timing belt/ verify that it hasn't jumped a tooth

moe7404

what did the old plugs look like? does it use more fuel than it should? does the clutch slip?

pro-tech

I Agree...Check the timing belt..I have also seen the tube between the throttle body and intake colapse causing it to starve for air...

blue 68 gts

Replace the Cam sensor assembly. /thread.

Neon2003

Dealer verified Timing is correct.
Old plugs showed normal wear.
I suggested to dealer CPS and they reported that it was good.
If dealership service cannot find the root cause then I will change CPS.
Thanks for feedback and all suggestions are welcomed.

blue 68 gts

If they say all that they've check is good, then your car should be running fine. Obviously something is not right.

I'm still betting on cam sensor and magnet. Common failure. Especially on SRT4 neons.

blue 68 gts

I just re-read this that it drives fine on level roads.... In that case it's most likely not a cam sensor issue. I'd be leaning more torwards a fuel pump issue. Have them test fuel pressure under load....

CJD AUTOMOTIVE

Look at short term adaptive at loss of power. If it starts adding 20+%, it is a fuel delivery problem.

Neon2003

Well dealer put another tech on the issue and he removed the exhaust and it ran fine.
-Clogged CAT.
Mmmm that's what I had them verify in the first place.

Thanks everyone for your feedback.

RacerHog

So it got a new CAT and car runs top knoch?????

Geeeeeeezzzz.... A dam 1/16 drill bit and a pressure gauge and a screw to plug the hole after he takes the reading before the CAT, And he miss read it.....
He's fired...

TVLynn

doesn't the emission equipment have a 100K mile wty ???

pro-tech

80,000 mile or 8 years

78D200

Welcome!