89 5.0 pinging, trouble starting when hot
Hi, maybe you guys can help me out...
My car is an 89 5.0 coupe ssp, mostly stock (k&n, exhaust, sus). It's been running strong since I got it, but suddenly started having some problems about a week ago. There's a lot of pinging/power loss under load, and the thing doesn't want to start when it's hot. Still starts right up and runs like a champ when it's cold.
I pulled the codes and got 22/23 in koeo (bap/tps), and passed the koer test. I've since tested and replaced both sensors and reset the computer - it resolved the codes, but had no effect on the problems.
Both issues came about at the same time (overnight, litterally) so I'm pretty sure they're related. I've replaced the rotor/cap, cleaned the tps, throttle body, bypass valve, and air filter - it got rid of some hesitation but no change on the pinging. I also just backed off the timing a bit down to 9* (it was running fine at 14* on 93oct), no change.
Any ideas why these symptoms would just appear suddenly, or advice on what to check next? BTW I've been through several tanks of (different) gas since this started.
Thanks in advance
Hi, maybe you guys can help me out...
My car is an 89 5.0 coupe ssp, mostly stock (k&n, exhaust, sus). It's been running strong since I got it, but suddenly started having some problems about a week ago. There's a lot of pinging/power loss under load, and the thing doesn't want to start when it's hot. Still starts right up and runs like a champ when it's cold.
I pulled the codes and got 22/23 in koeo (bap/tps), and passed the koer test. I've since tested and replaced both sensors and reset the computer - it resolved the codes, but had no effect on the problems.
Both issues came about at the same time (overnight, litterally) so I'm pretty sure they're related. I've replaced the rotor/cap, cleaned the tps, throttle body, bypass valve, and air filter - it got rid of some hesitation but no change on the pinging. I also just backed off the timing a bit down to 9* (it was running fine at 14* on 93oct), no change.
Any ideas why these symptoms would just appear suddenly, or advice on what to check next? BTW I've been through several tanks of (different) gas since this started.
Thanks in advance