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My car just got slower

 
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Old 24 Aug 2013, 04:25 pm
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Default My car just got slower

My car just randomly decided to get slower. A lot slower. I'm confused. I'm driving home going about 55 cruising in 5th and I wanted to get over so I put it in third and floored it. It must have taken 20-30 seconds to get up to 70. Usually it would only take about 5 seconds. I also noticed when I push the clutch and rev it, it takes longer to rev up. It feels like its restricted. Any ideas?

It has codes 1684, 0442, and 0456. I know the 1684 and 0456 have been there for a long time, the 0442 might be new but an evap leak doesn't affect performance. So basically I have no codes pertaining to my problem.

Any ideas where to start? I speed I can't drive it like this.
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Old 24 Aug 2013, 04:29 pm
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Default Re: My car just got slower

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Originally Posted by rob342 View Post
My car just randomly decided to get slower. A lot slower. I'm confused. I'm driving home going about 55 cruising in 5th and I wanted to get over so I put it in third and floored it. It must have taken 20-30 seconds to get up to 70. Usually it would only take about 5 seconds. I also noticed when I push the clutch and rev it, it takes longer to rev up. It feels like its restricted. Any ideas?

It has codes 1684, 0442, and 0456. I know the 1684 and 0456 have been there for a long time, the 0442 might be new but an evap leak doesn't affect performance. So basically I have no codes pertaining to my problem.

Any ideas where to start? I speed I can't drive it like this.
Do you still have the cat?
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Old 24 Aug 2013, 04:33 pm
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Default Re: My car just got slower

Yea. I floor the car so much though I can't imagine it could clog. I mean I even redline it sometimes before I park just to keep it clean. I drive home from work in traffic, then traffic goes away so I floor it in 2nd, hit 3rd for a lil bit and then park it.

I did notice the lack of power with the AC on, so I shut it off but it's still a turd. Just got off the phone with my family friend mechanic and his 2 ideas were restricted exhaust or timeing bet jumped a tooth. I'll check the belt first i guess since its easier

Last edited by rob342; 24 Aug 2013 at 04:43 pm.
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Old 24 Aug 2013, 04:35 pm
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Default Re: My car just got slower

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Yea. I floor the car so much though I can't imagine it could clog. I mean I even redline it sometimes before I park just to keep it clean.
Four bolts and a look see.
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Old 24 Aug 2013, 04:39 pm
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Default Re: My car just got slower

Vacuum data ?
Boost data ?
Timing data ?

Check compression possibly followed be a leak down?
Check fuel pressure?
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Old 24 Aug 2013, 04:48 pm
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Default Re: My car just got slower

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Vacuum data ?
Boost data ?
Timing data ?

Check compression possibly followed be a leak down?
Check fuel pressure?
I didn't want to go there. With the exception of vac. the rest is not a good thing. No boost,) that's it! He lost his boost. A can of pinto's will fix that.
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Last edited by Busted_PT; 24 Aug 2013 at 04:50 pm.
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Old 24 Aug 2013, 04:48 pm
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Default Re: My car just got slower

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Originally Posted by Busted_PT View Post
Four bolts and a look see.
4 rusty bolts that suck and might break. I'm really wanting to avoid this

Quote:
Originally Posted by NitroPT View Post
Vacuum data ?
Boost data ?
Timing data ?

Check compression possibly followed be a leak down?
Check fuel pressure?
I'll go see what kind of tools I can rent to check that stuff. I'm going to make sure the belt didn't jump first, since its fairly easy and I have these tools
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Old 24 Aug 2013, 04:48 pm
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Default Re: My car just got slower

I had to look up one of the codes.... LOL yup don't laugh! You are having 2 related emission codes may be the issue? If you can check you max boost and also the timing advance I am sure you will see both have been reduced. If you could measure you HCs I would guess a raise in them as well?

Find and cure at least 1 of the 2 clear all the codes properly using a Diagnostic scan tool only. I think I remember you saying you had one? Then see what happens. Your battery code should also clear out of RAM and pending DTC as well?l
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Old 24 Aug 2013, 04:52 pm
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Default Re: My car just got slower

A simple way to check if the CAT is plugged is checking the engine vacuum at idle and "bliping" the throttle. Also using a handheld thermal measuring device can measure higher then normal operating temperatures at idle speeds.

And the HC and CO levels will have exceeded specification limits.
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Old 24 Aug 2013, 05:20 pm
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Default Re: My car just got slower

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A simple way to check if the CAT is plugged is checking the engine vacuum at idle and "bliping" the throttle. Also using a handheld thermal measuring device can measure higher then normal operating temperatures at idle speeds.

And the HC and CO levels will have exceeded specification limits.
My car is NA so no boost here. I called 4 parts stores, I can only a rent compression tester and a fuel pressure tester. Should I buy a vacuum gauge? I mean that would make testing for a plugged exhaust easy? Before the pt I was always a no cat, open long tubes type a guy.

I'll clear the codes, check the timing belt, go rent the tools, and check back a little later. And yea it feels like I retarded the timing a lot.
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