Ok, I have an 02 bonneville. Problems; poor acceleration, 15-20 mpg drop, incline or no at 45-50 mph it sputters, with incline won't go over 55 mph, there is a weird sound like air being sucked or forced out from under the engine compartment while it's sputtering, it feels like the car is being pulled back when this is happening(the best way I can describe it), the engine light flashes but no code is being stored.
Things I've done so far; replaced, plugs(iridium), wires(top of line), coil packs all three(top of line), fuel filter, TPS, 02 sensor, MAF sensor, and fuel pump. Oh and checked all vacuum lines and components.
I am at my wits end, and dead end at that. Does anyone have any other ideas of what it could be and if there is a way to diagnose said problem without having to keep throwing money at it like a chimp with darts? Thank you for reading and anything will help.
02 bonneville.... Holly hell. Please help.
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Jimbledsoe
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nos4blood70
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Re: 02 bonneville.... Holly hell. Please help.
Clogged cat.
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
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00Beast
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Re: 02 bonneville.... Holly hell. Please help.
Not sure where you're at (emissions testing requirements), but high-flow cats are pretty inexpensive, and installation cost isn't too bad either. Probably have everything said and done under $250, and that's on the high end.
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RIP sandrock
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Trinity
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Re: 02 bonneville.... Holly hell. Please help.
2002 SSEI "Twitch"
INTENSE™ Fenderwell Intake Kit
INTENSE™ Modular Pulley System with 3.40" Pulley -
SD Headers H-Flow Cat
WB 255 Siemens 60.0 (65.0) pound/hour Fuel Injectors
Yella Terra 1.9 90# Manley Retainers
L32 LIM & Gen V Blower N* TB
INTENSE™ Fenderwell Intake Kit
INTENSE™ Modular Pulley System with 3.40" Pulley -
SD Headers H-Flow Cat
WB 255 Siemens 60.0 (65.0) pound/hour Fuel Injectors
Yella Terra 1.9 90# Manley Retainers
L32 LIM & Gen V Blower N* TB
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Jimbledsoe
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Re: 02 bonneville.... Holly hell. Please help.
I checked thee exhaust flow and it was fine. So I had the emissions tested and the guy said it passed cleanly. I didn't get the numbers, but he said my cat is working as it should be.
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nos4blood70
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Re: 02 bonneville.... Holly hell. Please help.
What's the state of your UIM? What about the PCV valve?
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
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optimist prime
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Re: 02 bonneville.... Holly hell. Please help.
Could it be the MAP sensor which sits on top of the pvc?
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2002 camaro 3800 v6 red headman headers ,Fwi,cat back exhaust currently has engine misfire
2002 camaro 3800 v6 red headman headers ,Fwi,cat back exhaust currently has engine misfire
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J Wikoff
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Re: 02 bonneville.... Holly hell. Please help.
Check the fuel pressure. The fuel pressure regulator could be shot and letting pressure just blow by. It also could be leaking gas into the vacuum line attached to it. Pull that line off right after shutting the car off and sniff/feel for fuel in it.
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Re: 02 bonneville.... Holly hell. Please help.
MAF sensor unplug it see how it runs
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jmusser218
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Re: 02 bonneville.... Holly hell. Please help.
EGR valve stuck open?
Re: 02 bonneville.... Holly hell. Please help.
I am on MAF sensor 5 now... and 4 previous "NEW" never worked. You said you replaces the MAF? Was it OEM or Ebay "new defective"