eg Gsr swap sudden loss of power
10-01-2018, 08:03 PM
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eg Gsr swap sudden loss of power
So I’m getting very frustrated trying to figure out this problem.
So i bought a gsr eg recently did the spark plug wires, spark plugs, coolant flush and oil change.
I went to cruise and I noticed my car had a sudden loss of power and the car had a weird humming / vibration when the car was cruising. The car also started to back fire more. The sudden loss of power is in the low rpm range, the power starts to pick up in the higher rpm. What could it be ?
So i bought a gsr eg recently did the spark plug wires, spark plugs, coolant flush and oil change.
I went to cruise and I noticed my car had a sudden loss of power and the car had a weird humming / vibration when the car was cruising. The car also started to back fire more. The sudden loss of power is in the low rpm range, the power starts to pick up in the higher rpm. What could it be ?
10-02-2018, 02:46 AM
#2
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Re: eg Gsr swap sudden loss of power
Did it run fine before you did the plugs and wires? What brands and what p/n of plugs did you use? What did you gap them to?
10-02-2018, 07:31 AM
#3
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Re: eg Gsr swap sudden loss of power
I got the ngk wires and plugs, didn’t set a gap but torqued it to 14 lbs. the car was still being weird before the change so that’s why I made the change and it’s still doing it, it’s like a slight misfire.
10-02-2018, 07:54 AM
#4
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Re: eg Gsr swap sudden loss of power
how does the car idle?
have you checked timing?
how does the plugs look? Burning lean or rich?
has it ever run correctly since you bought this car?
10-02-2018, 11:14 AM
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Re: eg Gsr swap sudden loss of power
car is all motor, when I changed out plug they looked burnt to **** so I replaced them with new ones, ran fine for a little and after a long drive it started acting up with a loss of power low end and the car would vibrate more than usual.
10-02-2018, 11:50 AM
#6
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Re: eg Gsr swap sudden loss of power
Sounds like probably misfiring, what do you mean plugs look burnt?? They were black? Could mean running excessively rich.
Gap your plugs, set the distributor timing, and go from there.
Gap your plugs, set the distributor timing, and go from there.
10-02-2018, 12:35 PM
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Re: eg Gsr swap sudden loss of power
every owner that had an eg with a gsr that posted in has stated the same thing, loss of power...
rich? check fuel pressure and make sure injectors are firing on all 4. good pattern too.
rich? check fuel pressure and make sure injectors are firing on all 4. good pattern too.
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10-02-2018, 08:02 PM
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Re: eg Gsr swap sudden loss of power
All injectors are working good I listened with a screw driver, changed cap and rotor no difference. Idle is at 400 and is misfiring at idle and it sputters . Pulled plugs with car on and all of them made a difference so I have compression in all 4
Car runs fine when the idle is high
Car runs fine when the idle is high
10-02-2018, 09:27 PM
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Re: eg Gsr swap sudden loss of power
I pulled cel codes and I got code 7 and 10 one for tps and another for intake air temperature I know the ait can’t be it because I have a after market intake and would a bad tps cause slight misfiring ?
10-03-2018, 03:40 AM
#10
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Re: eg Gsr swap sudden loss of power
I would lean towards the IAT sensor, it could definitely cause your problem. What would having an aftermarket intake have to do with it?
10-03-2018, 04:17 AM
#11
Re: eg Gsr swap sudden loss of power
You have to have a working IAT sensor. It is one of the core sensors that the the ECU constantly uses to compute the fuel mixture.
The TPS should be checked with a voltmeter. Improper readings will cause idle problems. Also watch out for the MAP and TPS plugs being swapped, though the engine usually runs really badly if at all when that is the case.
The engine cannot run smoothly at 400 rpm. The design idle speed is 750.
The TPS should be checked with a voltmeter. Improper readings will cause idle problems. Also watch out for the MAP and TPS plugs being swapped, though the engine usually runs really badly if at all when that is the case.
The engine cannot run smoothly at 400 rpm. The design idle speed is 750.
10-03-2018, 09:01 AM
#12
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Re: eg Gsr swap sudden loss of power
Reset ECU and the TPS code disappeared, I have an aftermarket intake and it doesn’t have the IAT on it.
drove to work this morning and noticed my car only misfires at low revs, it’s A very slight misfire but u can tell the slight power difference and u can hear the exhaust sputtering at idle.
drove to work this morning and noticed my car only misfires at low revs, it’s A very slight misfire but u can tell the slight power difference and u can hear the exhaust sputtering at idle.
10-03-2018, 07:26 PM
#13
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Re: eg Gsr swap sudden loss of power
What spark plugs did you purchase ??? What plug wires ???
Where is your IAT mounted now since you changed the intake manifold ??? It SHOULD be mounted in the intake manifold for optimum operation with an OBD-1 ECU... the temp swings are much narrower when the IAT is mounted in the intake pipe/tube. What wire colors are plugged into your IAT ??? The TPS needs to be properly set.
What ECU are you using ???
Where is your IAT mounted now since you changed the intake manifold ??? It SHOULD be mounted in the intake manifold for optimum operation with an OBD-1 ECU... the temp swings are much narrower when the IAT is mounted in the intake pipe/tube. What wire colors are plugged into your IAT ??? The TPS needs to be properly set.
What ECU are you using ???
10-09-2018, 08:17 PM
#14
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Re: eg Gsr swap sudden loss of power
Update !!
cleaned IACV
gapped plugs properly
checked spark and I can’t get any consistent spark on a bolt on the valve cover but when I slide the wire in the tubes then I could hear the spark, would that be weak spark?
I was going to buy a dizzy but couldn’t find a gsr OEM one near by so I was thinking about buying one from autozone but before I do I wanted to make sure it wasn’t anything else before I buy it
car on cold start the idle is at 1200 rpms but when the car warms up it drops to 300 rpms and starts making puff puff sounds like popcorn. Car has a 20% hp decrease I can feel it.
My exhaust sounds noticably deeper
also when cruising at low rpms I can hear something coming from the headers sounds like sand going through but it’s not lol
checked compression and I got 180 on all 4
anybody have any more suggestions ?
checked tps, checked all the wiring..
cleaned IACV
gapped plugs properly
checked spark and I can’t get any consistent spark on a bolt on the valve cover but when I slide the wire in the tubes then I could hear the spark, would that be weak spark?
I was going to buy a dizzy but couldn’t find a gsr OEM one near by so I was thinking about buying one from autozone but before I do I wanted to make sure it wasn’t anything else before I buy it
car on cold start the idle is at 1200 rpms but when the car warms up it drops to 300 rpms and starts making puff puff sounds like popcorn. Car has a 20% hp decrease I can feel it.
My exhaust sounds noticably deeper
also when cruising at low rpms I can hear something coming from the headers sounds like sand going through but it’s not lol
checked compression and I got 180 on all 4
anybody have any more suggestions ?
checked tps, checked all the wiring..
10-10-2018, 04:25 AM
#16
Re: eg Gsr swap sudden loss of power
It is not possible to delete the IAT and still have it run properly. It just isn't. Any pressure-density control scheme requires the computer to know the air temperature.
10-15-2018, 07:00 PM
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Re: eg Gsr swap sudden loss of power
I have the IAT and replaced it, still same problem. I also replaced the whole distributor and got a ry wire obd2 - OBD1 dizzy harness to make sure nothing was wrong with the janky wire that the previous owner did.
Still have the same problem so it has to be fuel related?
car drives ok, when it warms up the idle just drops down to 100 and sometimes it just goes from 100 - 800 like it’s hunting for an idle.
there is a little hp Power loss still .
I have. A lot. More back fires downshifting now I also
made sure the distributor was timed with a light
Still have the same problem so it has to be fuel related?
car drives ok, when it warms up the idle just drops down to 100 and sometimes it just goes from 100 - 800 like it’s hunting for an idle.
there is a little hp Power loss still .
I have. A lot. More back fires downshifting now I also
made sure the distributor was timed with a light
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