GreenRiverBoy
04-07-2016, 09:49 PM
Been a long time lurker here and have been able to keep my Previa operational by just reading past post but now have problem beyond me.
I have a 94 Previa SC with 215,000. I had not driven it much this last year and took it out for about 30 miles and on my way back home is when the problem started. During the trip back home, it started missing and running very rough. Felt just like an ignition issue to me. At idle it would almost die and if you hit the gas it felt as if it was "bogging" down. Like it was not getting fuel or air or maybe running too rich. The only way I got home was by barely giving it just enough gas to stay at a slow constant speed.
That was about 2 months ago and it has sat since then. Today, I replaced the spark plugs (autolite APP-3923 gapped at .043 torqued to 20ft-lbs), ignition rotor and distributor cap, fuel filter, air filter and fresh gas with no change in the problem. I was optimistic as I discovered the old spark plugs were for the non super charged engine (NGK BKR5EP-11 and have probably been used for the last 30K miles) and the ignition rotor and cap looked a little rough. I did not replace the spark plug cables as they have less than 20k miles on them. Maybe I should?
One observation is that it appeared to run ok if not fine up until the point the engine was warmed up. It started to miss and hesitate again just at about the time the engine temp allowed the transmission to shift into over drive.
Check engine light is on but this previa has an OBDII port near the fuses but also has the diagnostic port? under the seat. I don't think it is OBDII compliant because the sticker under the hood did not mention it. I tried to pull the codes by jumpering the TE1 and E1 terminals but the only thing that happened is the oil light would blink every 6 seconds (transmission in neutral and key in the on position). I have a OBDII scanner that will be here Sat so will try to read from the OBDII port just to try it. My gut tells me that this problem is sensor related or spark plug cables maybe but my gut feelings are wrong alot lately!
ANyway, if anyone has any idea what I should be looking at please let me know. I have to determine if this can be fixed on the cheap or not. If I can repair this problem, my next task is to rebuild the SAD shaft and replace all four struts/shocks but can't go forward until this problem is firgured out first. If I can bring my previa back to life I'm hoping to keep her for a few more years as it has always been a very solid and strong running vehicle. Well, I also love her too.:thmbup:
I have a 94 Previa SC with 215,000. I had not driven it much this last year and took it out for about 30 miles and on my way back home is when the problem started. During the trip back home, it started missing and running very rough. Felt just like an ignition issue to me. At idle it would almost die and if you hit the gas it felt as if it was "bogging" down. Like it was not getting fuel or air or maybe running too rich. The only way I got home was by barely giving it just enough gas to stay at a slow constant speed.
That was about 2 months ago and it has sat since then. Today, I replaced the spark plugs (autolite APP-3923 gapped at .043 torqued to 20ft-lbs), ignition rotor and distributor cap, fuel filter, air filter and fresh gas with no change in the problem. I was optimistic as I discovered the old spark plugs were for the non super charged engine (NGK BKR5EP-11 and have probably been used for the last 30K miles) and the ignition rotor and cap looked a little rough. I did not replace the spark plug cables as they have less than 20k miles on them. Maybe I should?
One observation is that it appeared to run ok if not fine up until the point the engine was warmed up. It started to miss and hesitate again just at about the time the engine temp allowed the transmission to shift into over drive.
Check engine light is on but this previa has an OBDII port near the fuses but also has the diagnostic port? under the seat. I don't think it is OBDII compliant because the sticker under the hood did not mention it. I tried to pull the codes by jumpering the TE1 and E1 terminals but the only thing that happened is the oil light would blink every 6 seconds (transmission in neutral and key in the on position). I have a OBDII scanner that will be here Sat so will try to read from the OBDII port just to try it. My gut tells me that this problem is sensor related or spark plug cables maybe but my gut feelings are wrong alot lately!
ANyway, if anyone has any idea what I should be looking at please let me know. I have to determine if this can be fixed on the cheap or not. If I can repair this problem, my next task is to rebuild the SAD shaft and replace all four struts/shocks but can't go forward until this problem is firgured out first. If I can bring my previa back to life I'm hoping to keep her for a few more years as it has always been a very solid and strong running vehicle. Well, I also love her too.:thmbup: