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03-14-2011
I have a 1999 3.8 GTP and when I accelerate the car seems to sputter and shakes badly sometimes. Almost feels like the trany is slipping, but shifts fine and deccerlerates fine. This problem only occurs when I try to maintain my constant speed, and when I am going up hills. I have changed the spark plugs and wires, and fuel filter. Need help I am lost. No check engine light either.
03-14-2011
Check all vacuum lines, sounds like a typical leak. Also make sure they are all ran correct. Check all rubber spots for cracks.
03-14-2011
thanks for the quick reply. I noticed today when i was driving home that my low coolant light keeps flashing but I have fluid in there could the coolant temp. sesnor be affecting this issue.
03-14-2011
No that usually doesn't effect engine performance like your experiencing.
That's what the fourms are here for.
Does that light come on all the time or just on initial start up?
03-14-2011
Well it comes on all the time after a while of running. I was told that the cts could be affecting it because that sensor regulates the fuel and air ratio.
03-14-2011
Only make one thread per topic.
Thanks.
03-14-2011
oh sorry candian guy. just worried about my car and trying to get fast replies.
03-14-2011
When you say you have fluid have you ever tried putting in more?
03-14-2011
yess it is completely toped off.
03-14-2011
As in to the top of the return tank? Shouldn't have the coolant completely toped off.
03-14-2011
no sorry I was talking about the rad. the tank stays in the levels that it suppose to when it is cold or hot.
03-14-2011
Any leaks anywhere in your system?
03-14-2011
Do you think this might be a tranny problem? and yea a minor oil leak
03-14-2011
How about this. To your original post. Id check all vacuum lines and make sure everything is connected correctly. Then go from there.
Your engine coolant level low light maybe a bad sensor?
My bad getting confused sometimes typing between two people having problems.
03-14-2011
alright sounds good I will go tomorrow and get that checked. I just wished there was a engine code it would be easier to fix.
03-14-2011
Could be quite a few things. Let's clear some of your questions up though. A coolant light for low level is just a nusance light on the dash that's driven by the sensor in the passenger side of the radiator. Frequently these will mess up. Easiest fix is unplug it. It doesn't run through the pcm and doesn't effect performance. ECT is the engine coolant temp (located below the top rad hose on teh lower intake manifold) this would effect performance, but if your dash gauge is reading good temps..than no worries.
Could be a dirty maf, bad coil, plugged cat etc etc. Any work recently done to the car?
03-14-2011
well my dash gauge reads good temp. I dont think it could be a plugged cat because I just had it changed a little while ago like 6 months ago. The only work I did to it was put rims on the car and that was it, and then it started acting all funny. I am going to clean that maf today and see what happens. thanks for the info.
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