Bumpin the TWP Posted May 28, 2011 Report Share Posted May 28, 2011 I have a 1999 Plymouth Breeze 4-cyl. 2.0L. My problem is that my car is supposed to get around 26 city and 28 highway MPG and for the first 9 months i had it i got that. But recently my gas mileage has been lowering majorly. my last take averaged at 17.3 mpg and i have been driving it carefully(kept under 2000 rpm-ish). I have brand new oil in it which is Castrol Edge with Titanium technology, so its pretty much top of the line synthetic oil. The car has 91,XXX miles on it and has been driven by my grandma its whole life till it was given to me, which i also drove it with care. If anyone has any other ideas on how i could fix my gas mileage problem tell me because gas is expensive nowadays and i cant afford it at the moment. Quote 2x Sundown Audio SA-15's nuff said for my little old car 1999 Plymouth Breeze Build Log Link to comment Share on other sites More sharing options...
08tahoe Posted May 28, 2011 Report Share Posted May 28, 2011 well you said you checked your oil already, so what about your tire pressure? i think that can affect it also Quote Link to comment Share on other sites More sharing options...
Dan2427 Posted May 28, 2011 Report Share Posted May 28, 2011 (edited) No check engine light? does it mis fire? I would check out your O2 sensors, maybe give it a tune up new plugs wires and distributer (sp?) cap. maybe fuel filter too. Edited May 28, 2011 by Dan2427 Quote 2003 GMC Yukon Denali Alpine CDA 117 Redoing Mids/Highs 4 Runs of 1/0 Knukonceptz 2+, 2- 4 Deka 9A31's in back (Stock underhood) 250 amp Alt. AQ20K 2 18" Crossfire XS V.2's 12 cubes 33hz 149sq inches of port! Link to comment Share on other sites More sharing options...
bass_stalker Posted May 28, 2011 Report Share Posted May 28, 2011 (edited) oil, tire pressure. check your filters. is it fuel injected? Edited May 28, 2011 by bass_stalker Quote JEEP BUILD PROJECT ANTIBLING.2000 jeep Cherokee.HEADUNITAlpine Cda-9886SUBSTAGE1 acendent 18" audio mayhem motor with a TI basket and tantric parts1 prototype DAT hellfire 1000.1HIGHSStockELECTRICALdb link 0 gaugeKnuconceptz Kolossus 4 gauge1 xs power d3400 under hoodBig 3 upgradeold fourwheeler build The only way to delete your SMD account is for you crawl to steve meades door step on your knees and pleade for his forgiveness and acceptance to be released...He will either grant your wishes.....or choke you with a large piece of 0 gauge and electrocute you by hooking up a solid gold DC 12k at 0.000001 ohm and 10000 volts to your eye sockets and blow your head apart You guys act like you have never clogged a toilet and ran around the bathroom frantically hoping it don't overflow. Link to comment Share on other sites More sharing options...
Bumpin the TWP Posted May 28, 2011 Author Report Share Posted May 28, 2011 yeah its fuel injected, im pretty sure theres no mis fires but ill check. And theres no engine or service light on ( and i know their not brunt out because they turn on when the car turns on as a start up thing like most cars do) Quote 2x Sundown Audio SA-15's nuff said for my little old car 1999 Plymouth Breeze Build Log Link to comment Share on other sites More sharing options...
bass_stalker Posted May 28, 2011 Report Share Posted May 28, 2011 if its running alittle bad you might have clogged injectors or you might have old plugs that need to be replaced Quote JEEP BUILD PROJECT ANTIBLING.2000 jeep Cherokee.HEADUNITAlpine Cda-9886SUBSTAGE1 acendent 18" audio mayhem motor with a TI basket and tantric parts1 prototype DAT hellfire 1000.1HIGHSStockELECTRICALdb link 0 gaugeKnuconceptz Kolossus 4 gauge1 xs power d3400 under hoodBig 3 upgradeold fourwheeler build The only way to delete your SMD account is for you crawl to steve meades door step on your knees and pleade for his forgiveness and acceptance to be released...He will either grant your wishes.....or choke you with a large piece of 0 gauge and electrocute you by hooking up a solid gold DC 12k at 0.000001 ohm and 10000 volts to your eye sockets and blow your head apart You guys act like you have never clogged a toilet and ran around the bathroom frantically hoping it don't overflow. Link to comment Share on other sites More sharing options...
Dan2427 Posted May 28, 2011 Report Share Posted May 28, 2011 try your plugs wires and cap first. Do you know if they ever been changed Quote 2003 GMC Yukon Denali Alpine CDA 117 Redoing Mids/Highs 4 Runs of 1/0 Knukonceptz 2+, 2- 4 Deka 9A31's in back (Stock underhood) 250 amp Alt. AQ20K 2 18" Crossfire XS V.2's 12 cubes 33hz 149sq inches of port! Link to comment Share on other sites More sharing options...
08tahoe Posted May 28, 2011 Report Share Posted May 28, 2011 maybe someone else that knows a little more could answer this, but maybe if he swithched gas grades or different gas brand as before, could that also affect gas mileage? Quote Link to comment Share on other sites More sharing options...
bass_stalker Posted May 28, 2011 Report Share Posted May 28, 2011 maybe someone else that knows a little more could answer this, but maybe if he swithched gas grades or different gas brand as before, could that also affect gas mileage? most likely not. all the octane is, is a measure of how hard it is to ignite the gas Quote JEEP BUILD PROJECT ANTIBLING.2000 jeep Cherokee.HEADUNITAlpine Cda-9886SUBSTAGE1 acendent 18" audio mayhem motor with a TI basket and tantric parts1 prototype DAT hellfire 1000.1HIGHSStockELECTRICALdb link 0 gaugeKnuconceptz Kolossus 4 gauge1 xs power d3400 under hoodBig 3 upgradeold fourwheeler build The only way to delete your SMD account is for you crawl to steve meades door step on your knees and pleade for his forgiveness and acceptance to be released...He will either grant your wishes.....or choke you with a large piece of 0 gauge and electrocute you by hooking up a solid gold DC 12k at 0.000001 ohm and 10000 volts to your eye sockets and blow your head apart You guys act like you have never clogged a toilet and ran around the bathroom frantically hoping it don't overflow. Link to comment Share on other sites More sharing options...
Bumpin the TWP Posted May 28, 2011 Author Report Share Posted May 28, 2011 ok thanks guys ill start testing. and btw i have a coil pack not a distributer lol Quote 2x Sundown Audio SA-15's nuff said for my little old car 1999 Plymouth Breeze Build Log Link to comment Share on other sites More sharing options...
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