Problems with boosting and stuttering - Page 4 - 3000GT/Stealth International Message Center

BlackStealth · 08-09-2008, 05:55 AM

Another possibility is that your TPS sensor did not receive a steady 5 Volt supply OR a defective ECS computer messed with your TPS signal.

Mad Dog Bodine · 08-09-2008, 09:45 AM

I have tried unplugging the ECS already....but it didn't make a difference....or didn't appear too. I only left it unplugged for a little while though. Unplugged it....and went for a drive. Noticed it didn't change anything....so the next day I plugged it back in. I found some documentation on calibrating the TPS to make sure its getting the proper amount of volts....so I am going to hopefully try get that done today.....

BlackStealth · 08-09-2008, 11:11 AM

Calibration of the TPS sensor is for the TPS output signal, not the 5V supply.

StealthTT93 · 08-09-2008, 11:41 AM

I don't know if it's been mentioned but I'd start with a pressure test. It sounds like you have a fairly large boost leak somewhere. Check your vacuum hoses, very likely that one got disconnected.

Mad Dog Bodine · 08-10-2008, 02:43 AM

Quote:

Originally Posted by StealthTT93

I don't know if it's been mentioned but I'd start with a pressure test. It sounds like you have a fairly large boost leak somewhere. Check your vacuum hoses, very likely that one got disconnected.

I will see what I can find....and I will let you know....

Mad Dog Bodine · 08-11-2008, 03:34 PM

What else besides ECS which I have unplugged and nothing seemed to change could cause the 5V supply to be messed up to the TPS? Is there away to test the TPS to see if its not fubarred?? I have read some where people have unplugged their TPS and other who have unplugged their MAS to see if the problems went away.....would it be worth my while to try either of these?? Just looking at any/all options.

Pressure testing will have to wait a little bit until I get my tester.....

Sin'sVr4 · 08-12-2008, 09:02 AM

i have the same problem. No matter what boost settings its at, it wont go over 6psi and it stutters. I changed out the plugs, NGK vpower 1 stage colder and same thing. Its at the shop so we'll see what is going on

Mad Dog Bodine · 08-12-2008, 09:11 AM

Quote:

Originally Posted by Sin'sVr4

i have the same problem. No matter what boost settings its at, it wont go over 6psi and it stutters. I changed out the plugs, NGK vpower 1 stage colder and same thing. Its at the shop so we'll see what is going on

It was pouring rain last night....so I didn't get a chance to work on my car. Its really weird, it pulls strong (or as strong as it can) until 6psi....then it stutters and stumbles all over itself. I have adjusted my BC and it doesn't seem to make a difference. After 6psi....the boost gauge still reads it going up to 10+ psi...but its stumbling and not pulling.
Hopefully it gets nice in the next day or so, still raining right now so I can go out and attempt to fix this very annoying problem. Good luck with finding out what is wrong with your car....keep me posted on the results!

BlackStealth · 08-12-2008, 09:30 AM

Quote:

Originally Posted by Mad Dog Bodine

What else besides ECS which I have unplugged and nothing seemed to change could cause the 5V supply to be messed up to the TPS?

Cruise control definitely reads the TPS sensor, and I think active exhaust too? Can't recall, it's been a while since I looked at the electrical diagrams.

My PVC valve arrived so I gotta go and grab it from the dealer today and try it out tomorrow. But I got a feeling something else is responsible. Will post results when I do find.

Mad Dog Bodine · 08-12-2008, 10:56 AM

Quote:

Originally Posted by BlackStealth

Cruise control definitely reads the TPS sensor, and I think active exhaust too? Can't recall, it's been a while since I looked at the electrical diagrams.

My PVC valve arrived so I gotta go and grab it from the dealer today and try it out tomorrow. But I got a feeling something else is responsible. Will post results when I do find.

Intereting....I am actually kinda liking all the learning I am doing from this problem....but I am still hating the problem

I liked it when I just installed my upgrades, turned the boost to 15psi....and had fun.

Here is something else I don't think I mentioned when thinking about when this started to happen. I had recently....well last year, had my clutch replaced(dealership)....and due to the break in period....never boosted hard. Then when the clutch was finally broken in, it was time to put the car away for winter. So I never ever truly got a change to put her through the paces after the clutch install. There was absolutely no problems with boost prior to the clutch going out. Can't believe I almost forgot the new clutch install.....

Need to get a pressure tester.....to make sure its not a big leak.....

08-09-2008, 05:55 AM	#31 (permalink)
BlackStealth Verified Seller Join Date: Apr 2000 Drives: 93 RT/TT Trader Rating: (162)	Re: Problems with boosting and stuttering Another possibility is that your TPS sensor did not receive a steady 5 Volt supply OR a defective ECS computer messed with your TPS signal.

08-09-2008, 09:45 AM	#32 (permalink)
Mad Dog Bodine Little Mauve secret Join Date: Jan 2001 Location: Fort McMurray, AB, C Trader Rating: (0)	Re: Problems with boosting and stuttering I have tried unplugging the ECS already....but it didn't make a difference....or didn't appear too. I only left it unplugged for a little while though. Unplugged it....and went for a drive. Noticed it didn't change anything....so the next day I plugged it back in. I found some documentation on calibrating the TPS to make sure its getting the proper amount of volts....so I am going to hopefully try get that done today..... __________________ 1994 Dodge Steath RT/TT "Mya" K&N Filter, MBC @ 15psi ATR DP, ATR Exhaust Autometer Boost, Autometer Air/Fuel Cusco Rear Strut, RPS Max Street Blitz Turbo Timer NGK Copper Plugs Magnecor 8.5, Kumho Ecsta 255/40/17 Eneki RP02 17x9 GTPRO Y-Pipe Hawk HPS Pads

08-09-2008, 11:11 AM	#33 (permalink)
BlackStealth Verified Seller Join Date: Apr 2000 Drives: 93 RT/TT Trader Rating: (162)	Re: Problems with boosting and stuttering Calibration of the TPS sensor is for the TPS output signal, not the 5V supply.

08-09-2008, 11:41 AM	#34 (permalink)
StealthTT93 Waterfall chairman Join Date: Dec 2002 Location: Varna, Bulgaria Drives: Fast Trader Rating: (0)	Re: Problems with boosting and stuttering I don't know if it's been mentioned but I'd start with a pressure test. It sounds like you have a fairly large boost leak somewhere. Check your vacuum hoses, very likely that one got disconnected. __________________ Doctors say alcohol is your enemy, God says love your enemy

08-11-2008, 03:34 PM	#36 (permalink)
Mad Dog Bodine Little Mauve secret Join Date: Jan 2001 Location: Fort McMurray, AB, C Trader Rating: (0)	Re: Problems with boosting and stuttering What else besides ECS which I have unplugged and nothing seemed to change could cause the 5V supply to be messed up to the TPS? Is there away to test the TPS to see if its not fubarred?? I have read some where people have unplugged their TPS and other who have unplugged their MAS to see if the problems went away.....would it be worth my while to try either of these?? Just looking at any/all options. Pressure testing will have to wait a little bit until I get my tester.....

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08-12-2008, 09:02 AM	#37 (permalink)
Sin'sVr4 One Sinister Motha Sucka! Join Date: Nov 2007 Location: Colorado Drives: 91 VR4/94 Wrangler Trader Rating: (9)	Re: Problems with boosting and stuttering i have the same problem. No matter what boost settings its at, it wont go over 6psi and it stutters. I changed out the plugs, NGK vpower 1 stage colder and same thing. Its at the shop so we'll see what is going on __________________ Still Waiting for her to get on the road!! $$$ and counting!!!!