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1995 Pontiac Sunfire HELP

Tiny
JPOLACKO
  • MEMBER
  • 1995 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 225,289 MILES
I got a 1995 Pontiac Sunfire with 4 cylinder 2.2L engine. Here for about a couple of weeks there's been some severe hesitaion everytime I tried to take off. (WORSE when the engine is at normal temp) Soo for I've looked at the TPS I've took a part the intake and cleaned it, Checked all vaccum lines, changed the fuel filter and ran a fuel pressure test (40 PSI it tested) unpluged the O2 sensor and made no differance, and Changed out the EGR Valve, put seafoam into the gas. I'm outta options and I don't know where else to look for this hesitaion. Any ideas would be awsome. Thanks Joe
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Sunday, October 10th, 2010 AT 7:43 PM

2 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any applicable trouble codes? Did you check the wiring circuits for the tps? Correct fuel pressure? You don't have a clogged exhaust?
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Monday, October 11th, 2010 AT 4:30 PM
Tiny
JPOLACKO
  • MEMBER
  • 2 POSTS
I did. I looked at all the sensor's and the only trouble codes that came up was about the safety switch on the transmission. I did some playing around today and got some backfire in the intake around the air filter. I did some looking around on the internet and the thing I found was something to do with the Timing but my car has a timing chain and its computer controlled.
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Monday, October 11th, 2010 AT 4:39 PM

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