HELP! PLZ! POOR ACCELLERATION NO POWER UNDER 2500rpm

Phil_Franc · Postby **Phil_Franc** » August 29th, 2011, 11:50 am

Wudn't a faulty coolant temp sensor would just cause me to jus run really rich ? .And I don't think is the handbrakes cuz as I said If I disconnect negative terminal for a while and plug back car runs real good for a couple days.

Phil_Franc · Postby **Phil_Franc** » December 4th, 2011, 1:19 pm

PROBLEM SOLVED! ...I believe ..I will post what happened soon.

Phil_Franc · Postby **Phil_Franc** » December 21st, 2011, 1:39 am

Alright so here's the solution . I realized this as I was mashing gas down the highway I managed to burst some steel coolant line over the engine. When i took the car to a mechanic to check it out, the line was rusted so much inside with big bubbles of rust constricting over half diameter of the steel pipe. The line was changed and the car runs more or less a lot better now . i was gonna take pics of the line but i forgot and threw it out . I still may have to check my fuel lines filters and gas tank for crap cuz im still not feeling full power but i suspect thats the main cause of the power loss. Cars been working well ever since. anybody with questions can msg or email me pdfrancois@live.com

Phil_Franc · Postby **Phil_Franc** » January 12th, 2012, 4:12 pm

Apparently, the above did not solve the problem. It worked fine for an unusually longer period of time but it still slowly reverted to its same problem. Ive also changed the fuel pump filter which did not help. Im now at a complete loss. Im really appealing to anyone to please help me with this problem. I cannot sell the car in this condition.

audiomagicians · Postby **audiomagicians** » January 14th, 2012, 2:04 am

ok u say when u unplug the battery terminals it starts to work fine for a while ..now im not sure how the subys work but when u reset the ecm on nissans the computer starts to relearn its owners driving habbits,where it will advance and retard the ignition alternatingly while u drive to find a suitable setting for your car... so it seems that this has somthing to do with the timing of the engine......im not sure if your car uses a belt or chain for timing but sometimes the belts may jump and miss a tooth sending the timing off and the chains are known to stretch which will cause miss timing....check back your engine timing and if there is a chain well check that too for stretching...its just a suggestion since u done do so much already..btw u sure u didnt overheat your engine?

Phil_Franc · Postby **Phil_Franc** » January 14th, 2012, 2:26 pm

thanks, if timing was off shudn't it show up in the compression test and if head gasket was blown etc id loose compression as well? cuz my compression test results came back good i may hav forgotten to mention it .

DSM_05 · Postby **DSM_05** » January 15th, 2012, 10:27 am

No. Timing has noting to do with compression AFAIK. Could be wrong though.
Perhaps your timing belt is installed badly.

Has it ever been changed? You should change it every 4-5 years or 100000km mileage (whichever comes first).

If it skips a tooth, it could result in an improperly/underpowered engine.

Phil_Franc · Postby **Phil_Franc** » June 21st, 2012, 11:28 pm

timing is fine . this problem still ongoing

astro1 · Postby **astro1** » June 22nd, 2012, 10:07 pm

head gasket have a slight leak

Phil_Franc · Postby **Phil_Franc** » June 24th, 2012, 11:16 pm

The Guys at Crism believe that the ECU may have been remapped at some point before ..I read a previous similar post to this where a guy went to neal and massey and had his ECU flashed. . I would be going down to Peak Performance sometime to have them check it .. hmm it is possible there is a slight leak .. u know any signs other than crappy performance that could indicate this??