Low RPM Stutter has progressed to Rough Idle/Labored Accel
#1
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Location: Cary, North Carolina
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Low RPM Stutter has progressed to Rough Idle/Labored Accel
Benevolent Bonneville Gurus,
Do lend me your expertise. What started as a Low RPM stutter under load has progressed to a rough Idle / labored acceleration problem with my '95 SSEi
When driving, I sense crisp throttle response, but the engines seems like its being starved for gas and/or feels like the my 3 year old high flow cat is plugged. The engine hesitates, stumbles and has very little power.
I shot a video of my engine. Hopefully you can discern the electrical popping noise in the audio (especially at the end).
http://s5.photobucket.com/albums/y17...Bonneville.flv
I've already replaced the following:
TPS sensor
EGR Valve
Vacuum hose connectors
I've tested the Coil packs as per Techinfo instructions
- cleaned K&N air Filter
- checked all fluids
- used injector cleaner in gas tank
- cleaned TB and carefully cleaned MAF
- Examined my 2 year old Bosch Platinum 100k mile plugs and premium wires - Not fouled and still gaped correctly (I examined just one from the front)
Any help would be greatly appreciated!
Do lend me your expertise. What started as a Low RPM stutter under load has progressed to a rough Idle / labored acceleration problem with my '95 SSEi
When driving, I sense crisp throttle response, but the engines seems like its being starved for gas and/or feels like the my 3 year old high flow cat is plugged. The engine hesitates, stumbles and has very little power.
I shot a video of my engine. Hopefully you can discern the electrical popping noise in the audio (especially at the end).
http://s5.photobucket.com/albums/y17...Bonneville.flv
I've already replaced the following:
TPS sensor
EGR Valve
Vacuum hose connectors
I've tested the Coil packs as per Techinfo instructions
- cleaned K&N air Filter
- checked all fluids
- used injector cleaner in gas tank
- cleaned TB and carefully cleaned MAF
- Examined my 2 year old Bosch Platinum 100k mile plugs and premium wires - Not fouled and still gaped correctly (I examined just one from the front)
Any help would be greatly appreciated!
#2
Junior Member
Posts like a Ricer Type-R
Here'* a good start for you:
http://www.bonnevilleclub.com/forum/...=article&k=103
Do the wires at the same time. The majority here prefer Belden Premium'* from NAPA. The Series 2 set fits fine.
http://www.bonnevilleclub.com/forum/...=article&k=103
Do the wires at the same time. The majority here prefer Belden Premium'* from NAPA. The Series 2 set fits fine.
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Besides "honey ... your getting lucky tonight" is there anything sweeter than listening to one'* Bonneville purring like a kitten?
Willwren, you were exactly right about the plugs and wires being bad. In fact, when I went to pull the #6 wire, it was almost severed just above the connector and had been arching (thus explaining the popping sound).
The wires were only 2.5 years old and were 8mm Autolite premiums. I took your reccomedatoin on new Napa Wires and Copper Plugs
I'm a first time poster, but a long time reader. I appreciate all who contribute their knowledge here. Sometimes it'* a bit challenging using the forum search function, but I'm getting better at it.
Is there a diagnostic flowchart somewere in the archives, by chance?
Thanks again!
Willwren, you were exactly right about the plugs and wires being bad. In fact, when I went to pull the #6 wire, it was almost severed just above the connector and had been arching (thus explaining the popping sound).
The wires were only 2.5 years old and were 8mm Autolite premiums. I took your reccomedatoin on new Napa Wires and Copper Plugs
I'm a first time poster, but a long time reader. I appreciate all who contribute their knowledge here. Sometimes it'* a bit challenging using the forum search function, but I'm getting better at it.
Is there a diagnostic flowchart somewere in the archives, by chance?
Thanks again!
#8
DINOSAURUS BOOSTUS
Expert Gearhead
The Autolite Professionals are also a very good wire. It'* a shame that we didn't mention other options to you for wires.
While the Napa'* are good...they are not the only good choice out there. If I remember properly, the Autolite Pro'* are a lifetime wire and we could have had you get a fresh set for free instead of the cost of the new Napa ones.
While the Napa'* are good...they are not the only good choice out there. If I remember properly, the Autolite Pro'* are a lifetime wire and we could have had you get a fresh set for free instead of the cost of the new Napa ones.
#9
Senior Member
True Car Nut
I just happen to have Autolite Pro'* on mine, by chance. I put them on years ago to attempt to get a better wire than I had before then. They are still good today.
Also, regarding your request for a diagnostic flow chart. Probably the best that we could provide, given enough time to put them together, would be to provide a short series of diagnostic charts for the most common issues we've noted here. Bear in mind that the current '96-99 Factory Service Manual is a two-volume series that measures about 3-1/2" thick when put together. In that manual are many many different flow charts.
That is why we regularly suggest the purchase of a set of FSMs to those that will be doing more than minor and ocassional repairs to their car. The $30-$75 you pay for a used FSM set on ebay will usually more than come back to you after one major repair or a couple minor ones.
Also, regarding your request for a diagnostic flow chart. Probably the best that we could provide, given enough time to put them together, would be to provide a short series of diagnostic charts for the most common issues we've noted here. Bear in mind that the current '96-99 Factory Service Manual is a two-volume series that measures about 3-1/2" thick when put together. In that manual are many many different flow charts.
That is why we regularly suggest the purchase of a set of FSMs to those that will be doing more than minor and ocassional repairs to their car. The $30-$75 you pay for a used FSM set on ebay will usually more than come back to you after one major repair or a couple minor ones.
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