89 2vz-fe camry v6 power loss - air system...

[7polly7777]

Hi,

My 89 camry (v6) was losing power and responsiveness in the midrange - just a quick note for anyone with a similar problem - check your hoses!!! I had a large split in the hose connecting the air filter to the throttle body - plugging this with yet more glue has sorted the problem...

On a different note, can anyone suggest an aftermarket airfilter system that would fit this engine or am i best spending the $167 (AUD) on a new hose (a new filter is required too...)?? The current hose already has a large piece of duck-tape sealing one split and half a tube of araldite sealing a further two splits :O So it is getting rather past its use-by date! The cheapest I have seen the replacement part so far is c$75USD.

I also have a second problem: After running (fine) at temperature and parking the car for around 30-60 mins when I come to restart the car it starts fine, idles fine, yet runs very rough for around 10-20s with very little power as soon as I hit the gas (chugs violently almost as though it is threatening to backfire). NOTE: The car has hardly cooled down in this timeframe...
I'm a bit of a loss as to what is causing this problem since the car runs fine after this and the problem is not usually there on cold-starting (ie: after it is left overnight; though it is never very cold here...). The timing is fine (this problem was still there before I retarded the timing due to pinging); the air filter isn't perfect (up for renewal) though I do have a fuel-line that is weeping a little bit. Can anyone suggest any other likely causes??? Could the O2 sensor be a problem or would this cause grief all the time?

Thanks in advance

Matt

[Mike Gerber]

I would check the engine coolant temperature sensor with a digital volt ohmeter for being slightly out of range. Toyota calls this an ECT sensor. It may not be sending the right information to the ECU (computer) upon restarting a warm engine. The ECU uses this information to meter the air/fuel ratio. I'm not sure where it is located on your V6, but it is usually under a green colored plastic connector.

Mike

[7polly7777]

Originally Posted by Mike Gerber

I would check the engine coolant temperature sensor with a digital volt ohmeter for being slightly out of range. Toyota calls this an ECT sensor. It may not be sending the right information to the ECU (computer) upon restarting a warm engine. The ECU uses this information to meter the air/fuel ratio. I'm not sure where it is located on your V6, but it is usually under a green colored plastic connector.

Mike

Hi Mike, thanks for that. Before I go for a rummage for the 'stat (which from memory is somewhere down near the waterpump on the '89 v6), would a fault caused by the temperature sensor be logged by the ECU? I was thinking it may be easier to dump the ECU fault codes and see if the machine also thought this was the problem (since I guess they are ultimately be connected...). I'll have a look this coming weekend.

Thanks again

Matt

[Mike Gerber]

Originally Posted by 7polly7777

Hi Mike, thanks for that. Before I go for a rummage for the 'stat (which from memory is somewhere down near the waterpump on the '89 v6), would a fault caused by the temperature sensor be logged by the ECU? I was thinking it may be easier to dump the ECU fault codes and see if the machine also thought this was the problem (since I guess they are ultimately be connected...). I'll have a look this coming weekend.

Thanks again

Matt

That's probably a good thought. However, I have seen situations where the older Camry's ECUs (OBD1 systems) didn't pick up everything. I had an 86 Camry 4 cylinder that was having a problem, that I eventually traced to a bad O2 sensor, even when there were no fault codes present. I would check for trouble codes and if you find 1 or more present, then you know what needs to be corrected. If no codes are present, then I would still check the ECT sensor with a DVM.

Mike