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| 3800 suddenly jerking/stuttering under throttle and overheating (Page 1/1) |
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Jasperr
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APR 08, 11:22 PM
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3800 Series 2 non-supercharged.
Had the car off the road for a month or two while I got new tires and ball joints. Today decided to take it from my shop back home, like 3 miles. Once I got onto the road from the driveway I pressed down on the pedal and the car nearly stalled out. I let off and it acted normal. If I gave it any more than the lightest amount of throttle the revs jump up then immediately fall back down again and again. With a light touch on the throttle the car shifted and accelerated so I just kept going since it's a short distance. When I pulled in at home the temp was starting to get too hot as well.
Squirrels are a bit of a problem at my shop (on a farm) I'm worried maybe they messed with something... I was daily driving it like 15 miles to and from work every day before I parked it with no issues.
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Patrick
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APR 08, 11:56 PM
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I know this may seem obvious... but plenty of gas in the tank?
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Jasperr
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APR 09, 12:16 AM
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My gauge can be a bit missleading, however I know it isn't 100% full though, so I can add some. I have run out of gas in it before but the result was it just dieing on the spot with no real feeling of it about to run out before it happened.
But I wouldn't think that'd cause it to overheat?
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Patrick
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APR 09, 01:00 AM
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| quote | Originally posted by Jasperr:
But I wouldn't think that'd cause it to overheat?
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I'm just grasping at straws here... but if the gas level was low and the fuel pump was partially sucking air, could the engine not be running a bit lean?
I'm trying to find an easy solution for you. 
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olejoedad
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APR 09, 11:21 AM
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Did you retain the EGR when you did the swap?
If so, check the wiring for damage.
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Jasperr
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APR 10, 09:11 PM
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It dawned on me that I can hook a scanner up to this car now, duh. It's throwing codes P0125 and P0128. The temp sensor is brand new as of doing the swap, so I suppose I'll inspect the thermostat.
That being said, would those codes result in the throttle problem? Maybe the computer telling it to cut fuel as a result? It is possible the fuel pump could be struggling though, the car itself has somewhere over 200,000 miles (Odometer stuck) the new engine of course does not.
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Patrick
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APR 10, 11:49 PM
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| quote | Originally posted by Jasperr:
It is possible the fuel pump could be struggling though, the car itself has somewhere over 200,000 miles (Odometer stuck)
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Whether it's due to an almost empty tank or a suspect pump (or a rotten internal tank hose), it sure wouldn't hurt to check fuel pressure!
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Jasperr
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JUL 24, 11:51 PM
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Sat on the backburner for a while I'm back with more info.
Overheating is solved, o-rings on the heater hose outlets had failed.
The stalling/stuttering problem is still present. It only happens when starting from a stop, once the car is moving it's fine. If it starts doing it I have to lift off the gas, and slowly go back into it and then it will accelerate as normal.
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KissMySSFiero
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JUL 25, 09:43 AM
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I've had similar issues. It turned out to be the MAF sensor.
on the scan tool, it was "sticking" on a value, then suddenly changing. That's where it stumbled.
No codes were thrown. You can disconnect the MAF and it might go away(if it's the issue) and throw a code.
Cleaning was no help for me, I had to replace the MAF.
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SSFiero@Aol.com
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Jasperr
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JUL 25, 10:49 PM
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I'll check that out, I might have a backup one. And yea there are no codes being thrown at this time.
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